Finis Positive Drive Fins Swim Fins for Men and Women - Swim Flippers to Use with All Four Swim Strokes - Swimming Fins for Swimming and Pool Accessories

Like the fins! Good for breaststroke swimming and for freestyle.

UPDATE-Amazing feedback for optimal "slicing" position of feet. LOVE them as that side to side "flutter" went away after 3 weeks of use so that likely means that my "stabilizing muscles" that hadn't been activated got activated and adapted/grew. I now would like to assert that these aren't "specialty" fins but are the only fins one needs for competitive swim training.WOW! works VASTLY better than hoped for breast stroke and side stroke (I am an old school Lifeguard; and will always keep up my side stroke performance) kicks!!! TRULY optimized for these kicks. On scissors kick, I did notice a side to side "flutter" or "shudder", not performance robbing; and I actually believe that ones tiny leg "stabilizing" muscles will get developed to counter act this motion. So, SUPER for breast stroke kick; and good, but not optimized for, scissors kick. I wear a 13 shoe and the XLs are a perfect fit!

I wore them today while swimming for an hour. I felt some pressure points in certain areas at first. I took them off, readjusted, and didn't feel any more rubbing. The fins didn't feel too big or cumbersome, but it was a little hard to tell compared to the other kinds of fins.They are heavier than the silicone brand of flippers, that's for sure, but not too heavy, surprisedly. Easy to slip on and off in water and on dry ground. Plus, they are comfortable. I love being able to move my ankle freely.On the performance aspect of the fins. It's hard to describe how the fins adjusted my body for the correct posture. I tried to give in to it and just go with it. My body was resisting, unsure how to kick with these new sets of fins. After the first five laps, it felt great doing the crawl. My kick felt stronger and more efficient.During the backstroke, it was way more easier, and less energy was being expelled.I did a few kick sessions, and the dolphin kick was cumbersome but still needs some practice.The one kick I had some trouble with that couldn't be corrected this session was the breaststroke kick. It's like my body forgot how to do it with the fins. But I'll definitely get it next session.I'll wear my swim socks with them to prevent any more blisters. They fit right over them. My shoe size is 9.5 women, and I bought XL as instructed and suggested by others.

I cannot say how much I love these fins! They are hard to get on at first, do put them on in the water, but they are worth it.After breaking my ankle and arthritis setting in I had to take up swimming seriously as the only exercise I can do aerobically. (I watch YouTube tutorials for proper technique for more efficient swimming. ) I could never get the proper propulsion to exercise my legs. These fins not only help the foot to propel properly they give added weight, as I guess any fin would, to help exercise the legs. The compact size, comparatively speaking, and in the zipper bag, makes them easier to carry to the pool too. (I did not use these until about 18 months after the ankle break; I would not advise for that therapy.)I ordered by my shoe size, being a US women’s 9 1/2B I ordered the size down as instructed. They are tight but not too long; if I’d gotten bigger they might have been too long to be effective but will not fit a wide or puffy foot. As it is, they function perfectly. After the first use they are much easier to put on and the stretchy straps help there (I tap the ‘toe’ against the pool wall to push them on) though still struggle to remove—they have an odd suction effect like a snorkeling mask, kind of funny actually. But I love them, use them for about 40 minutes of my hour swim (for breast, back, and side strokes after a 20 minute crawl without them.) I keep them on for added resistance during the post swim stretch too doing ankle, leg, and hip circles. Highly recommend for new swimmers.

I simply don't see how this can receive good reviews. To get right to the point - they simply are painful to wear. I have size 12 foot and bought XX-Large as recommended.What basically happened is that the heel strap pulls the fin back on your feet (as it should). However the fin is mostly rigid, particularly on the top and at the foot entrance to the fin. It literally cut the top of my foot with its edge. It rode on top of my foot, being pulled almost to my ankleI found if I forced the fin to push on my heel and not my arch/ankle, they were almost tolerable. However I could not get the fin to stay in that position while kicking. In the end, I could not make it through one swim session with these and they are now in the corner of my closet. I may try to find some kind of liner for the fin or protective band for the edge on top to salvage them. However I have not come up with a good idea yet.I really wanted these to work. Usually I find the reviews on Amazon to be useful and mostly accurate, but in this case I do not understand why other reviewers had such good reviews.I have never had problems with other ifs or shoes so I don't believe my foot shape is unique and caused the problem.It actually is so bad, I have wondered if they are counterfeit or somehow made wrong - but that seems unlikely so in my closet they sit.

I must say that the adjustable strap is not easy to adjust.The top part fits too close to the top of my foot. I will try them with my swim socks and update my review.Tried them with my swimming socks, the top rubs really hard and leaves marks and it is painful. They are great in the water for most kick styles. I am returning these and will order a smaller size, will see.