Arena Unisex Adult Powerfin Pro II Swim Training Fins Men and Women Silicone Short Blade Flippers Left-Right Customized, Sizes 4.5-13.5

I’ve always used conventional swim fins - the closed heel design usually available to borrow at the pool. I decided to splurge on these and am not disappointed. I was a little nervous about having my heel loose, but it turns out the loose heel is a much better design. I normally wear a 9 in women’s dress shoes, a 10 in women’s sneakers. I got the 7.5 to 9 size (sized based on men’s sizes) and they fit well. The material is really soft and flexible. I do get some friction around my big toe, but much less than I used to get from the conventional design. These fins are expensive but worth it.

I felt these were expensive...but after the blisters on my feet and ankle and knee pain from another fins...I figured I would give these a try...I would have returned them if they did not work for me.Theses are the best flippers I have ever used. They don't hurt or blister my feet. I have hyper extended joints, and they really allow my ankles to be flexible without over doing it or putting excessive strain on my knees. My kick is also stronger from using them regularly in kick sets. I have greatly improved my underwater dolphin on my back. They really work my quads too.I am in US Masters Swimming, in my 40s, and have practice three times a week. I wish these were around in my high school days.I can't recommend them enough and hope they work for you too.

Arena makes the best fins for competitive swim training. Size guide is true to size.

My swim coach told me I needed to get these fins. They're durable and excellent for training.

Best fins I have ever used. The sizing seems a little large.

I bought these to replace an old pair from a different manufacturer. My shoe size is 8.5, so I ordered Medium. My previous fins had adjustable ankle bands, which had become a hassle to deal with. So I was surprised how well these fit. Quite snug but never too tight or uncomfortable.

Worked well out of the box.

Good fins