Tuesday, August 19, 2014

A Review of Fins for Scuba Diving and Snorkeling

Review updated 11-12-15:
Mares Volo Power fins: My first choice for diving.  

I just spent a full month diving Papua New Guinea (PNG).  I brought only one pair of fins on this trip, the Mares Volo Power fins.  I am overwhelmingly impressed and happy with these fins.  I was able to swim underwater with great power, in scuba gear and carrying a camera with strobes, in a near two-knot current back to the boat.   The fins are light, fast, comfortable, and powerful.

I never experienced cramping on the entire month-long trip.  The fins struck the perfect balance between stiffness and flexibility -- they were just right; not too stiff and not too flexible.  When swimming with them, I felt the fins giving a nice springing motion to my kick.  Stiff fins are more powerful, but after a full day of diving, I will often experience calf or thigh cramps when using them -- sometimes cramping in both areas, which is really painful.  Some less flexible fins cause pain in my old knees. 

I was able to control my movements with the fins when taking photos or video.  I did not feel that these open-heel fins were any slower than full-foot fins that I've used in the past.  The standard (older) style fin strap worked just fine.  I had a little trouble getting the fins on and off, and I did not like using the ABS buckle to get the fins off.  Once on, the fins and fin pocket were extremely comfortable.  I used them with both very thin and thicker wetsuit socks.  My only quibble with the fins is that they seem a bit too long sometimes (when I am situating myself to take a photo, the long fins interfere with my positioning occasionally), but this is a minor quibble. 

In short, the Mares Volo Power fins are terrific, perfect for traveling, powerful enough to get a diver through currents with lots of gear.  They are my first choice for diving fins.

Unfortunately, Air Niugini lost my bag containing a camera housing and my now-favorite fins.  It's been three days, and the bag is officially lost after a week.  I hope that I get my bag and these fins back). 

(Note: I updated this review on 9-2014 and 4-2015 to include my impressions of several more models of fins:

Mares Volo Power
Force Fin
Mares X-Stream
Mares Avanti Quattro+ (Quattro Plus)
Mares Power Plana
and Apollo Biofin Pro with stainless steel straps.
Reviews of these fins are at the beginning and end of this blog entry.

The fins that I rate highest (for speed, light weight, and comfort) are:
Mares Volo Power
Force Fin
Sherwood Elite

I found each of these three fins to be comfortable and I was able to swim laps very quickly with them, with minimal cramping.  I tested the Sherwood Elite and Force Fins while SCUBA diving, and they were powerful enough for SCUBA diving while carrying a DSLR rig with two Ikelite DS-160 flash units.  I have not had the chance to test these fins for their power while diving with a rebreather and bulky underwater video gear, nor with a drysuit.  I did find that the Sherwood Elite fins caused some pain in my knees when swimming, and their foot pocket was a bit stiff and hard.  I found that the Force Fins worked well even in currents, but the open toe design could cause a diver to scrape the top of his foot against rocks or reef.  This can be a big problem; once a diver has a cut or scrape on his foot, it can preclude diving.  I also got tired of people laughing at how fast I was kicking through the water with the Force Fins -- a minor thing, but an irritation. 

Open-Heel Fins: 

Mares Volo Power open-heel fins: 1 lb 7 oz per fin; $164.95 as of 4-15-15; +3 speed rating.  These fins, after a month diving in Papua New Guinea, have become my favorite fins.  I liked these fins as soon as I put them on.  They felt very comfortable on my foot, and struck a nice balance between stiffness and being a bit flexible.  I was able to swim extremely fast on the surface and underwater with these fins.  

The fins are 24" long, which seems an ideal length.  They come with a standard Mares ABS buckle and strap system, rather than the newer bungee straps.  I like these buckles and straps just fine. 

Mares states that all its fins adhere to the same size: if a size Medium fin fits your feet in one Mares fin, it should fit you in another model.  I have found this to largely be true, but still -- each fin fits my foot slightly differently.  This fin's fit was ideal.  It did not encase my entire foot, like the Mares Power Plana and some other models did.  Because my entire foot and heel were not encased, I felt like my calf muscles had more of an affect on my strokes.  When swimming very hard for a long distance with these fins, my calf muscles cramped with these fins.  With other fins where my heel was lower down in the foot pocket, my feet would likely have cramped before my calf muscles.  In short, I felt like I was able to use all my leg and ankle muscles with these fins, because my entire foot was not encased.

After writing the above, I took out the Power Plana and Avanti Quattro Power + fins that I tested recently, and which felt different from this fin.  With these fins, the foot pocket seemed deeper, so that the heel of my foot was completely encased.  I did not like this feature; I felt more restricted in my finning with my entire foot encased inside the fin foot pocket.  Photos at the end of this section confirm my hunch: the foot pocket for these fins is about 8.25"; whereas the Power Plana has a foot pocket of 9" deep and the Avanti Quattro Power + has a foot pocket depth of almost 10 inches!

These fins are near-perfect for me.  I was able to swim very fast with them for a long distance without becoming uncomfortable.  They  were not so stiff as to be cumbersome and ungainly, and the foot pocket was not too deep, so I could use all my leg muscles.  I look forward to trying these on a dive trip for an extended period, with a big camera and rebreather gear to gauge how well they are suited to carrying bulky loads underwater. 

Sherwood open-heel Elite fins; 1 lb 8oz; $99 at scuba.com; +3 speed rating; negatively buoyant; standard fit. I was very impressed with these fins. They are the lightest open-heel fins that I have seen. They were super easy to get used to and were the fastest yet in the water. The foot pocket is a bit hard and narrow. With booties, I started getting foot cramps both times that I tested the fins. My fins came with rubber straps that had nice quick release buckles on them, but were not adjustable. They were a little tight when I wore booties, but when I wore these fins with only Henderson Microprene fin socks, these fins felt pretty good (the hard foot pocket was still hard).

I later used these fins with thicker neoprene socks and with EZ spring straps from Leisurepro. I was pretty happy with this combination (4-15-15 after several dives using somewhat thick Tilos neoprene socks, I am happier with the standard silicone strap that come with these fins, purely because they fit well and comfortably).  These fins are fast, fairly stiff, but I seem to be able to maneuver in them. I like them a lot and may use them for tropical AND fast snorkeling (eg whale sharks, whales) with thicker fin socks (not booties).

The Sherwood Elite fins are among my first three choices for snorkeling and diving in tropical waters, with thicker wetsuit socks or booties.  I look forward to trying a pair of these in size Large, to see how they work with my drysuit.  I like the fact that these fins come with a standard post so I could mount EZ spring straps on them.

The Sherwood Elite fins have what I believe are "standard" post and buckles.  They come with silicone straps.  I found that EZ spring straps from Leisurepro fit these fins just fine.  I also found that spring straps from Scubapro Twin Jet Max fins fit the Sherwood Elite buckles. 

Force Fins: 1 lb 6 oz per fin; retail $229.95, +3 speed rating, very negative (they sink like a rock).  

The Force Fins tied with the Sherwood Elite and Mares Volo Power open-heel fins for my favorite fins.  All three of these fins are extremely light at 1.5 pounds per fin.  The Force Fins are very flexible and fit my feet very well.  Like the Mares Volo Power fins, I liked them as soon as I put them on.  I was able to swim extremely fast with these fins, with no cramps in my calves, feet, or thighs after swimming a number of laps in the pool.  I tested these fins on a recent trip to Socorro, and they were powerful enough for me to swim pretty well underwater with a DSLR camera rig.  Other divers on the trip laughed at me, however, saying that my feet were whirling by like helicopter rotors.

These fins don't look very sexy.  In fact, you will be laughed at if you use these fins.  But the folks who have these on dive trips tend to love them.  I myself have never seriously considered these, but for the purposes of this review, I bought a pair off Ebay to try.  I have to say that I am impressed and that I like them a lot.  They provided plenty of power and speed both when swimming laps as well as when I was SCUBA diving.
The fins are easy to put on and take off.  The Force Fin website has a table that gives foot size and the size of the relevant fin.  I found this table to be spot on.  The length of the Force Fin  is only 17” from foot pocket start to tip of fin. It took me a bit of time to get used to them, but then I could swim very quickly and without feeling effort.  The back of my heel sticks out of the foot pocket about one inch, which was very comfortable.

The only drawback to these fins is that the top of my foot comes out of the foot pocket and is therefore exposed.  I wore neoprene socks with these fins, and I did find that I scraped the top of my foot a couple of times.  Because I was often swimming vigorously with these fins, I needed to take care not to hit my fins and feet on anything.  I need to be a better diver and more aware of where I am kicking with these fins -- a good thing for any diver.
Here's some text about the Force Fins from their website.  This text is about the Pro Force Fin.  To be honest, I don't know if what I bought from Ebay is the standard Force Fin or the Pro Force Fin.  I have to grudgingly agree with everything said on their website about the Force Fins. 
Ranked among the most efficient fins. Preferred by Special Forces and serious fin users. Features Force Fin's toes-free foot pocket that reduces cramping and leverages power from your strongest kicking muscles, for a most efficient kick. Easy to pack. Small, effective blade is the perfect size for turbulent free and fast movement of water. Easy to maneuver.

Orginal review:

You can be forgiven if you think that choosing a pair of fins for scuba diving should be an easy task. I used to think so. After nearly 40 years of diving, I am still learning about what kinds of fins work best for me in different situations. I’ve dove in markedly different environments over the years, ranging from diving under the ice in Antarctica, to the cold temperate waters of northern California, to tropical diving around the world. I've gone from carrying little gear; to SLR housings as a professional underwater photographer; to large 70-pound HDCAM and film housings while wearing a drysuit and using a rebreather.  My diving has ranged from carrying this gear in still, clear tropical waters; diving with double tanks in 150 foot depths with heavy currents while carrying a 70-pound camera housing; to trying to keep up with sperm whales at the surface. I've learned some things along the way that no book or magazine will tell you. 

Every person is different, and fins for diving are perhaps the most personal and difficult choice of gear to get. I can only describe my situation and hope that this review helps other folks figure out what to look for in a diving fin. I got certified at the age of 15, I am in my mid-50s, and I’ve spent the past 25+ years working as a professional underwater photographer. I am short and round, I am in decent shape for swimming and diving, but I am 30 to 40 pounds over my ideal weight. I swim regularly at a local pool (about 1.1 miles every other day) but that has not been enough to combat my bad food habits. I have small feet and short legs compared to giant white males but my feet are wide. I am 5 feet six inches tall, my feet are size 7-1/2 and I prefer New Balance shoes since I can get them in a wide EE size.

It's ridiculously difficult to find important information on fins. One of the criteria for choosing fins is how heavy they are. If two fins are equal in other ways, I would prefer fins that are lighter, purely because I need to minimize the weight of my luggage to avoid excess baggage fees. I was surprised that many manufacturer's websites do NOT list the weight of their fins with their products. For instance, Scubapro has a lineup of very popular fins, but their website does NOT list the weight of their fins (or other specifications such as length of the blade). In order to find the weight of these fins, I had weigh them myself. I couldn't find any website that listed the weight of these fins. For some manufacturer's fins, I could go to the Leisurepro website and dig down to find this information. I did weigh every fin that I personally tested. 

I undertook this review because I wanted to know what the dang fin weighs, see how it fits on a real person, get a sense of how fast or slow it is, and get a sense of how maneuverable the fins are. In the past two years, I spent hundreds of dollars buying fins (on sale) from LeisurePro and searching local dive stores' clearance bins (the stores ranged from my home base in Monterey to as far afield as Bali, Maui, and West Palm Beach). I have tried out and weighed about a dozen pairs of fins, and I've preliminarily settled on about three favorite styles which I will use for various types of trips: classic warm-water coral reef trips where one does a lot of macro photos and needs to maneuver as well as swim in currents; whale and dolphin trips where one needs speed above all else; and cold-water trips (classic diving on reefs only; forget cold-water speed swimming in a drysuit!).

In the past months, as my plan for this review became clearer, I wrote to several diving manufacturers to ask them to supply their best fins for this review. The good folks at Mares, ScubaPro, and Sherwood recognized the value of such an article (as well as my 25-year history in this industry) and supplied me with a few of their models of fins to test. They were quite generous in supplying the gear, and I give them my thanks. Manufacturers who support reviews like this obviously want to get the information out there and realize that they have great products. I wanted to test some of Oceanic and Aqua Lung's fins, but they ignored my requests. This article is a work in progress; I'd welcome trying out just about any fin and if you are a manufacturer who would like their fins included, please contact me.

I've had a few learning experiences over the years, and I would like to share those first. 

When I started working as an underwater photographer, I traveled all over the world to tropical locations. I preferred full foot fins for the beginning of my career. As an underwater photographer, I needed fins that were easy to carry around, were powerful enough to let me photograph while swimming against currents, were light for travel, and let me maneuver easily to get into position underwater. I used Cressi's full foot Free Frog fins during this period. They were relatively light (1 lb 12 oz per fin), fit my feet well, gave me enough power to swim against currents (I was carrying still cameras and strobes, not bulky film housings), and allowed me to maneuver underwater just fine. They held up through years of tropical diving and were a great combination of letting me maneuver around a reef, ease of using them, and powering in strong currents.

Swimming with a bulky HDCAM housing, photos by James Watt
Starting in 2001, I started shooting video underwater with a large, bulky 70-pound housing that had an early Sony HDCAM professional HD camera in it. I then started diving with an Inspiration rebreather. I got certified with this rebreather in Mexico, then did some diving at Cocos Island with my very large HDCAM housing. Until then, I had always done my tropical diving with my trusty Cressi Free Frog full-foot fins.

I discovered, when diving with this rebreather and still camera housings off Cocos Island with my friends Howard Hall and Bob Cranston, that my Cressi full foot Free Frog fins were not capable of giving me enough power to get me through the water with a bulky rebreather on my back. These fins were just barely adequate.

Swimming with a bulky HDCAM housing, photos by James Watt

I later had to keep up with diving officer Doug Kesling and his crew at the University of North Carolina, diving with double tanks at 150 foot depths for long periods, battling strong currents and carrying a large HDCAM housing, using these same Cressi Free Frog fins. It was nearly impossible – the fins just weren't powerful enough. I also caught a ton of flak from the crew of the NOAA research vessel for not having foot protection when walking on deck – they required adequate foot protection when walking on the deck of the boat. Rubber sole booties were barely acceptable, and fin socks were not acceptable. I had to wear booties to cross the deck, jump in the water, take my booties off, and store them in my BC pockets – a huge pain in the butt. I should have just brought some open-heel fins. With the bulk of a rebreather or double tanks, and large video housings, I quickly learned that full foot fins were not powerful enough. I needed to graduate to powerful, open heel fins.  
For these reasons, since I've started carrying heavier and bulkier gear and diving in different situations, I've found that open-heel fins are preferable to full-foot fins in most diving situations, even tropical diving. I have always felt, and still do, that full foot fins (which are shaped to fit a bare foot) offer more speed than open-heel fins (which have larger pockets to fit diving booties with rubber soles). However, when I am walking across the deck of a boat, walking back up a coral rubble beach of Bali, or just getting ready to dive off a small dive tender – open-heel fins make a lot more sense to me now than before. Being able to wear thick neoprene socks or booties to protect my feet in all these situations is a huge plus over having bare feet.

I am not a fan of booties, however. In my late thirties, I had a job filming mangroves in Bonaire using a large film camera. I wore some booties that zipped up the ankle. They were not particularly tight, but they nevertheless caused incredible pain when I was filming mangroves in Bonaire. This had not happened to me before. Just a few months before that, however, I had tried downhill skiing, and wearing the boots for those skis caused me similar incredible, debilitating pain. I believe that my feet widened as I aged and gained weight. Because of the problems with my booties (I had brought only open-heel fins, realizing that I would be tramping through mangroves), I bought some inexpensive snorkeling fins in town. I realized quickly that these fins really, really sucked. I won’t name the brand or model, but these are inexpensive fins marketed toward beginning snorkelers. The moral of the story is that serious divers, who are carrying a great deal of bulky gear on them that creates water resistance, need to find fins that are professional grade. Don’t get fins meant for novice snorkelers at the ABC shop in Maui and expect those fins to work well. These flimsy fins are downright dangerous, since you won’t be able to swim against the slightest current to get back to your boat.

Because my feet are so sensitive to booties that are tight, I use booties that are ankle-high rather than the ones that zip up past the ankle (I prefer neoprene slippers, not booties that are tight and inflexible). I test them before bringing them on any trip, to make sure that they do not constrict my feet. I like the Tilos booties that I have now, but I still get foot cramps and pain when swimming with them. If I can get by without using booties, I much prefer wearing thin neoprene socks, that protect my feet from blisters but don't put any pressure whatsoever on my feet. I've been using Henderson's great Microprene Fin Socks for years and years.

My good friend Douglas Seifert invited me on a trip to swim with sperm whales in Dominica in 2010. I learned, during this trip that involved trying to keep up with pods of whales (and the speedy Douglas!), that open heel fins, with lycra socks under a pair of booties, was the best combination for me in this situation of intense, all-day, frantic swimming. Full foot fins had always worked for me in the past in this situation – even with weeks of swimming with dolphins in the Bahamas Banks in the early days. However, as I aged, I had to take care of my feet more. Now, trying to swim too much with full foot fins, even with a lycra sock, causes a blister almost immediately. Almost nothing is worse than a blister on your foot during a diving trip. It will cause you to sit out the rest of the trip, and so I take great care now to wear Henderson Microprene fin socks (or lycra socks) under booties, along with open-heel fins (not full foot). I discovered the best pair of open-heel fins for this kind of fast snorkeling by doing this review – the surprising light, speedy Sherwood Elite open-heel fins. I discuss these fins in more detail below.

My old Henderson Microprene socks, well-used.  Thanks, Henderson!

I also dive a great deal in cold water. I live on Monterey Bay in California, and the water temperature here ranges from 45 to 55 degrees F. It's cold, and I always wear a drysuit when diving here. Diving in northern California waters was great practice for my diving in Antarctica in 1997 through 2001, and later in 2008 and 2009. I used Cressi full-foot Frog fins for all of my diving in Antarctica in 1997 through 2001. They worked fine but are outdated. In recent years I have used Scubapro Twin Jet split fins (open heel) with my drysuit. I've been happy with the Twin Jet fins. They are floppy, not stiff, but the foot pocket is super-comfortable over my drysuit booties. I have been interested in how these Twin Jet fins compare to other open-heel fins.

Split Fins verus Conventional Fins:
I also wanted to see how split fins compare to conventional fins. We photographers need power sometimes, but we also need our fins to be flexible so that we can position ourselves easily and without throwing up a lot of sand. I have noticed that many divers with split fins swim too close to the bottom for some reason, kicking up clouds of sand behind them.  I have heard that with split fins, divers should use a smaller, more frequent flutter kick for maximum performance.

I mentioned buying fins from dive stores' bargain bins – I likely won't be doing this in the future. I bought a pair of split fins and a pair of conventional fins in the past two years, and they were so bad that I can't use them. One was a split fin, open heel design that has good reviews online. The split fins were stiff. I found that they work fine when swimming laps and sightseeing, but they were so stiff that I could not maneuver with them. With any kind of fin, as a photographer, I need fins that allow me to swim against currents, but just as importantly, I need fins that will accommodate a slow style of drifting and maneuvering. Photographers will swim a bit, notice a subject, then have to turn around or back up using a backwards stroke of the fin. The Scubapro Twin Jet fins allow me to do this; the bargain bin split fins did not.

Some fins are just too stiff and do not work for me in any way. I bought a pair of flourescent green conventional (not split fin) open-heel fins from a local dive store. These were from a very well-known manufacturer of diving fins. Here's what I wrote in my notes: "Tried them in the pool twice over six months to be sure. Seems to give a lot of power and maneuverability but is also a bit stiff, very hard on the knees, when diving with a drysuit. Could not swim with these in the pool, just too heavy and stiff. Worst fins ever, don't name them. Tried swimming underwater with them, a little better but still slow. Very stiff, hurt my knees, did not swim well with them. Size Small fit my feet with booties perfectly" 

About sizing of fins: Most manufacturer's websites and the Leisurepro website list US shoe sizes matched up with sizes Small, Medium, Large, and Extra Large. These tables don't specify if the sizes work if wearing a bootie or drysuit bootie. I have a size small foot (US men's 7.5). I found that with a dive bootie, most fins (Mares, Sherwood Elite, Scubapro Twin Jets) match my shoe size. In other words, my shoe size of 7.5 with a bootie corresponds to a size small open-heel fin for most fins. My drysuit booties are much larger than my wetsuit booties, and fins that are another size or even two sizes up work with my drysuit (eg size Medium or Large in the Scubapro Twin Jets work with my drysuit booties).

How the fins fit is obviously extremely important.  My size 7.5 foot in a bootie or thick neoprene sock would fit in most fins that are called size Small by the manufacturer.  Some fins are sized larger, so that a size small for them might be a size Medium  for others.  For instance, I found the Sherwood Elite fins size Small to fit my feet with booties just fine.  The Apollo fins in size Medium were way too big for my feet with booties, and in my opinion should be called size Large.  I have noted if fins are a "standard" fit or oversized. 

Spring Straps versus Rubber Straps:
Some fins have posts on them which allow you to put on stainless steel spring straps instead of rubber straps. I like these steel spring straps, and I commend those manufacturers who make them and who make their fins with the post, thereby making it easy for divers to put in after-market spring straps. For instance, the Sherwood Elite fins come with their own rubber straps and with the proper type of post to mount other straps on them. I was able to put on EZ Spring straps (from leisurepro.com) which I preferred over their stock rubber straps. Scubapro's fins do NOT have these posts, but their stainless steel spring straps (from their Twin Jet Max fins) could fit into the Sherwood Elite fins since they had the same size buckle (which goes over the post). The Atomic's buckle arrangement does sort of fit onto the “standard” post of the Sherwoods but not well or elegantly. Atomic fins have a one-off arrangement where the entire buckle comes off, not a quick release.

Testing fins:
These tests are largely subjective, but I did try to test the fins consistently. I discovered a pool close to the Monterey area where I was able to swim laps consistently in the past year. After a couple months of swimming a standard routine (three sets of 400 yards using exercise fins, and two sets of 400 yards swimming underwater and using the crawl stroke), I felt that I was in decent shape and would not get much faster. For my normal swimming with fins, I used a pair of “Pod” fins, which are simple fins used for exercise and boogie-boarding (also called bodyboarding). These are short-bladed fins made of stiff rubber.

I tested each pair of fins two or three times. I swam a quarter mile with the Pod fins first to warm up, then swam a quarter mile with the test fins, timing myself. I strived to be as consistent as possible when swimming; but in the end, the times with the fins are subjective. I rate the fins as 0, +1, +2, or -1; with “0” based on swimming times with the Pod fins. Please keep in mind that body shape and height is likely a large factor in how fins work for each person. I am a short, round guy who is not particularly athletic but nevertheless has fairly strong legs. If you are a tall, slim, collegiate swimmer, then the fins that work best for me may not work well for you. Taller folks might prefer fins that are longer than the ones that worked well for me. 

I tested all these fins using the flutter kick, swimming on the surface, holding onto a swimming float, and kicking my legs up and down.  I then swam underwater with the fins, sometimes stopping underwater and trying to swim backwards a bit.  I did not test the fins using the frog kick, which is a kick I use often underwater.

My friend Alan Studley mentions: 
You didn't mention the Cave kick, which is a modified frog kick...I mention the Cave kick because it is very efficient for long swims. I can go for hours without low back pain.
In my recent course, I mentioned the efficiency of the Cave kick to a student who was large and the same height as me. He was always lagging behind with his traditional Flutter kick. So the second day he tried the Cave Kick and was keeping up with me and with much less effort.  Cave kickers usually use a Stiff blade fin vs Splits. I've used the Atomic Split and they work fine when Cave Kicking.

I did find that some fins just didn't work well for me at all. I have purposely declined to name these fins and their makers by name. I have found that folks in the diving industry don't take criticism well. This attitude is regrettable – enlightened makers of dive gear should welcome honest and constructive criticism of their gear. Fortunately, most divers and photographers like my reviews a great deal because they are honest and informative.

Here's a listing of the fins that I have tested to date, including the weight per single fin, price (at leisurepro.com unless otherwise stated); speed rating (based on time to swim a quarter mile); buoyancy; how the fins fit; and miscellaneous observations.

Pod bodyboarding fins; 1 lb 5 oz; $40 at an Oahu North Shore surf shop; +0 (baseline) speed rating; positive buoyancy; standard fit; these are considered “beginners bodyboarding fins and are good for exercise swimming because they are not too stiff." I discuss bodyboarding fins in another blog post. These fins float, which is a good thing for surfing but a bad thing for diving. I always prefer fins to sink rather than float, so that I can place them on the seafloor if needed and count on them to stay there.  From http://www.churchillfinsreview.com/what-are-the-best-bodyboarding-fins-to-buy/ : Smaller training fins provide resistance without overloading joints, ligaments and tendons. They also help shift effort to the foot, increasing leg strength by encouraging propulsion with a leg kick in the form of a pedaling motion that’s the same as a flutter kick without a fin.

Open-Heel Fins: 

ScubaPro Twin Jet open-heel Split Fins in black; 2 lb 0 oz; $169; -1 speed rating (slower than baseline); standard fit. I've had a pair of these fins in gray, size Large, for several years. I use them with my drysuit; they are extremely comfortable. They let me swim around in my drysuit without creating pains in my knees. My feeling prior to testing these is that they were comfortable but a bit slow, and my testing bears this out. I tested the Medium size, which were a bit large for my foot in a bootie. Swimming with these is slow but very pleasant. I felt like I was hardly using any effort, but I was still tired after swimming 400 yards. One strange thing is that my thighs cramped up almost as soon as I started moving around in these fins, something which did not happen with any other fins so far. Seems to give enough power and is very maneuverable. Very comfortable to put on and wear. The rubber strap with the quick-snap buckle system has worked well for me for years.
These fins came with traditional adjustable rubber straps, but I can see that there are stainless steel straps that fit the buckles on these Twin Jets. 

The buckle on the Twin Jet fins are non-standard.  There are no posts, so you can't add "standard" spring straps from other companies.  I have seen spring straps made specifically to fit Twin Jet fins.

These fins were black in color. Back in 2001, Sergio Angelini, a longtime star engineer, designer, and executive in the diving industry (who has helped me a great deal over the years – thanks Sergio!) gave me some Twin Jet fins, which were brand new at the time. Here's what he wrote, “I am sending you out two sets of fins. There is a soft version (blue or grey...) and a stiff version (black). Typically, people not used to the split fin technology will immediately love the black, and maybe be perplexed by the soft version. But once you get used to them, the soft ones are better: faster, more efficient, more comfortable. Some people use the black for cold water diving with lots of gear that causes drag, and the soft ones in warm water. I myself use the soft ones, and I dive with drysuit, pony bottle strapped to the front left, 3 big lights strapped to the front right, and we have very big currents ....  Both pairs will be size L, which will definitely fit over your drysuit.

“Of the Three Colors, the Black Fins are the most Rigid and offer a more traditional fin experience. The Black Fins are slightly negatively buoyant. The Blue Fins model is made of a more buoyant and flexible compound than the black models. This allows you to achieve the most Bang-for-your-Kicking Buck. These fins are slightly positively buoyant. The Yellow Fin option is made of a compound similar to the Blue model, but offers the greatest opportunity for you to be seen underwater. The Yellow fins are slightly positively buoyant.”

This Twin Jet fin is size Large.  It is much too large for my normal dive bootie, but it fits my drysuit bootie just fine.  I consider these fins to be normal in terms of standard sizes, meaning a size small would probably be appropriate for my foot in a dive bootie. 

I checked with Scubapro.  They no longer make the gray version, but still make the yellow and blue colors.  These fins are indeed more flexible, if the above comments still apply. I do a lot of shark diving trips, where the leaders of the trips only allow all-black or all-dark diving gear – so using fins that are yellow or have bright colors is not a good option. On the other hand, long, bright yellow fins make a good signaling device when you are in the middle of the open ocean (say, at Cocos Island) and drifting away from the dive tender or mother ship.

Scubapro Twin Jet Max open-heel Split Fins; 2 lb 8 oz per fin; $189; -0.5 speed rating (slower than baseline); standard fit. These are a stiffer version of the Twin Jet series. They came in a nice mesh bag, with super-comfortable stainless steel straps. The size Mediums were just a bit large for my feet with booties; they fit my drysuit booties well. A pair of these fins will weigh 5 pounds, which is a fair amount of weight for fins (in comparison, a pair of Sherwood Elite fins, size Small, would weigh only 3 pounds). Swimming with these fins felt effortless, but fairly slow, coming in at 10 seconds slower than my standard Pod fins. Given the weight difference and my sense that these stiffer split fins won't maneuver as well, I'd choose the older Twin Jet fins over these for drysuit diving.

The Twin Jet Max fins do offer what look like standard posts to attach spring straps from other companies.  However, the posts were just slightly too large to fit the EZ spring straps that I bought from Leisurepro.  The Twin Jet Max fins did come with their own spring straps, which I could use on the Sherwood Elite fins because the buckles --not the posts -- fit together. 

Atomic open-heel split fins: 2 lb 7 oz per fin; $209; +1 speed rating; positively buoyant; standard fit.  Upon first seeing these fins, I expected them to be slow.  I was wrong.  They are pretty heavy out of the water (a pair of fins will weigh almost 5 pounds); but once in the water, they are comfortable and pretty fast.  Here are my notes after using them a couple of times: I really liked these after trying them.  Pretty fast, powerful, and maneuverable. 

The post for a strap on the Atomic fins looks like a standard one -- but it is not...I was not able to put an EZ spring strap on the fin. 

Full Foot Fins:

Mares Plana Avanti Quattro Power full foot fin; 2 lb 2 oz; $144; +2.5 speed rating; negative buoyancy. I tested these twice over six months. These are long, heavy full foot fins. The fins are 29" long, and the size 8-9 fit me pretty well (just slightly large) with lycra socks. These fins are great, although heavy and stiff, for tropical diving. They are fast and powerful. Using these fins gave me foot cramps when I tried them first, but I did not get much discomfort when trying them again six months later. I was able to shave 20 seconds off the normal time with the Avanti Quattro Power fins and it would have been even more time (faster) if I did not have to turn around at the ends of the pools each lap. I found the fins to be extremely fast and powerful, but also very tiring to use. Someone who has longer and more powerful legs than me will love these fins.

Cressi Free Frog full-foot fins; 1 lb 12 oz; $34 at scubastore.com; +1 speed rating; negative buoyancy; fins are 25 inches long and fairly flexible. Using the Free Frog fins, I was able to go slightly faster that I was with the Pod fins. It took a bit longer to get moving, but once I got moving, I moved slightly faster. My legs felt more tired. Part of this was due to the bad fit of the Free Frog fins; they were not tight on my feet. These full foot fins can be hard to get on and off quickly. After using the longer fins, using the Pod fins almost felt like I had nothing on, and that they were not doing anything. These fins have been around a long time and I used them with success for years. However, I'd recommend newer models of full-foot fins rather than buying these, even though the price is low.

Atomic full-foot Split fins; 1 lb 7 oz; $89; +2 speed rating. The Atomic full foot split fins were very stiff, but good after I got used to them. It took a while to get up to speed, but then they were fast and efficient. Divers interested in ordering these fins should order a size up. I ordered a size 7.5-8 but the fins were a bit too tight for my feet. I'd like to try a size up with lycra socks, and to re-measure my swimming time with these fins.

Mystery Brand Split Fins that I Do NOT recommend:

I've bought two sets of fins by known, famous manufacturers from the bargain bins of dive stores.  Here's a pair of fins that I will be putting in the trash.  I bought these in a dive shop in West Palm Beach.  They allowed me to swim in a straight line, but they were absolute impossible to use when I was underwater and trying to maneuver.  I have never used any fins that were so problematic underwater.  I've covered the name of the fins so the manufacturer doesn't take offense at this post.  Sorry, these fins just did not work for me. 

Mystery split fins -- these would not allow me to manuever underwater at all. 

Mystery” flourescent green open-heel fins from a famous brand; $40 at Bamboo Reef's clearance bin; could not finish 400 yards with these; negative buoyancy; standard fit. These fins came in a size Small, which fit my foot in booties just fine. I had high hopes for them. Unfortunately, they just weren't for me. My notes: Seems to give a lot of power and maneuverability but is also a bit stiff, hard on the knees, when diving with a drysuit. could not swim with these in the pool, just too heavy and stiff. Worst fins ever, don't name them. Tried swimming underwater with them, a little better but still slow. Had a bad experience using them with drysuit in Channel Islands. Very stiff, hurt my knees, did not swim well with them.

Reviewed after 9-1-2014: 

Apollo Biofin Pro with stainless steel straps; 3 lb 2 oz per fin; $200 or so; +1 speed rating; oversized by one size (+1). I have a pair of these fins in size Medium. The size Medium is pretty big – too big for using in a wetsuit bootie.  Be careful when buying these fins as they are oversized.  These are heavy fins.  I’ve used them for a bit of diving in the tropics but the weight is too much for me to travel with.  They've therefore been sitting in my garage for several years. 

 Apollo does offer a stainless steel strap for these fins, but it attaches using screws on the fin -- a proprietary attachment.  You therefore can't use other companies' spring straps on these fins nor can you use the spring straps on other fins.
Note the stainless steel strap uses a proprietary attachment. 

The Apollo fins are oversize -- these are size Medium and are equivalent to most size Large fins. 
For this review, I swam a few laps with them to confirm my earlier thoughts.  They are fast, they are maneuverable, and they are heavy.  If you want power, speed, and the ease of swimming that comes with a splitfin, then these fit the bill – but the Atomic splitfins are just as powerful, fast and maneuverable, and they weigh less.  I’d go with the Atomic splitfins over these heavy suckers.  

 In summary: The Apollo fins are oversize -- their size Mediums are equivalent to size Large fins from other companies.  They are the heaviest fins around.
was lower down in the foot pocket, my feet would likely have cramped before my calf muscles.  In short, I felt like I was able to use all my leg and ankle muscles with these fins, because my entire foot was not encased. 
After writing the above, I took out the Power Plana and Avanti Quattro Power + fins that I tested recently, and which felt different from this fin.  With these fins, the foot pocket seemed deeper, so that the heel of my foot was completely encased.  I did not like this feature; I felt more restricted in my finning with my entire foot encased inside the fin foot pocket.  Photos at the end of this section confirm my hunch: the foot pocket for these fins is about 8.25"; whereas the Power Plana has a foot pocket of 9" deep and the Avanti Quattro Power + has a foot pocket depth of almost 10 inches! 

Mares X-Stream open-heel fins: 1 lb 10 oz per fin; $180 as of 9-2014; +0 speed rating.
These fins look great on the web and in photographs.  They have a cool name also.  I understand that they are very popular with many divers.  However, I am sorry to say that I was not overly impressed with these fins.  They are fairly light fins, but I found them to be fairly slow to swim with.   I felt that they would not provide me with enough power once I was carrying even a small scuba diving load. 

These fins are about 22.5" long, and they have the standard Mares ABS buckle system with a rubber (or perhaps it is silicone) strap.
After testing these a second time, I found that the foot pocket is deep at 9.5 inches -- covering my entire foot past the heel.  I prefer foot pockets that are not as deep. 

Mares Avanti Quattro+ (Plus) open-heel fins; 1 lb 15 oz per fin; $130 on Leisurepro (Amazon as of 4-10-15 has this fin paired with a free mask at the same price!); +1.5 speed rating.

These are long, powerful, stiff fins. They might be ideal for divers carrying heavy cameras and wearing rebreathers.  I should state that my tests of fins just involves swimming laps on the surface of a pool, without a load.  Few divers are going to use their fins to try to swim 400 yards quickly.  Instead, they may need more power from their fins intermittently, rather than feeling comfortable swimming quickly for a long distance.  These fins might be perfect in such instances.  I look forward to trying them along with my favorites on a diving trip.

These fins use the new Mare bungee strap.  From the Mares description: "The buckle system has also been replaced with a bungee strap for easy donning and removal of the strap and fins from the foot."

I found the bungee strap to work fine.  I liked the older ABS buckle system just fine too. 

Mares Power Plana open-heel fins: 3 lb per fin; $143.95; +0 speed rating; negative buoyancy.
These fins are Mares' answer for divers who still use Scubapro Jet fins, which have been around for as long as I remember.  They are made of rubber and are very heavy at 3 pounds per fin.  They feel good in the water, but I did not like the wide foot pocket, which covered my entire foot past the heel.

These fins use the new Mare bungee strap.  These Power Plana fins are incredibly heavy and are average in speed.  They are obviously powerful fins, and are likely suited  for tech divers and cave divers.   Two folks who are expert divers have recommended these fins highly.  They are therefore worth a look although they are too heavy for me.  

Note on Mares foot pocket depth: 

I noticed that I felt that the foot pocket in the Mares Avanti Quattro+ and Mares Power Plana seemed to be deeper than the Mares Volo Power open-heel fins.  With these fins, the foot pocket seemed deeper, so that the heel of my foot was completely encased.  I did not like this feature; I felt more restricted in my finning with my entire foot encased inside the fin foot pocket.  Photos here confirm my hunch: the foot pocket for the Mares Volo Power fin is about 8.25"; whereas the Power Plana has a foot pocket of 9" deep and the Avanti Quattro Power + has a foot pocket depth of almost 10 inches! 


To come:

Scubapro Nova Seawing open-heel Split Fins; 2 lb 2 oz per fin in size L; $139; speed rating to be tested; standard size.  

1 comment:

Anonymous said...

Hi Norbert,
I enjoyed reading your review of fins article. A couple of years ago, before I went to Dominica to snorkel with sperm whales, I also tested several fins in a pool to find out which was fastest for me. I used several of the fins you tested and also a couple of long bladed free diving fins. For me, my kids pool fins were clearly the fastest and as an added benefit, the smallest and lightest. I have been using them for years when snorkeling and although I always get weird looks by others using long bladed free diving fins, I am almost always the fastest in the water with my silly looking fins.

For diving, I like my Force Fins. They are also small, light and funny looking. Although they are not the most powerful fins I have used, for me the trade off in light weight is worth it. I dive with housed DLSR so maybe if I was lugging a large video setup, the Force Fins would not be powerful enough.

Just my 2 cents from a fellow short Asian diver