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

First, about the fins. I had been using TYR fins for 2 years. The TYR fins are OK, but they were hurting my toes, and I wanted something different. I bought these Arena fins. The Arena fins are slightly shorter and a little wider than my old TYR fins. The Arena fins make me go faster than the TYR fins, and I feel the kick better than with the TYR fins. With the Arena fins, I am more than 5 sec faster versus the TYR per 50 with my flutter and dolphin kicks. Because I can feel the water better, I am hoping that results in better conditioning and performance. Second, about sizing. I wear a men's US size 9. I first bought these fins men's size 8 to 9 US. I liked that the foot was snug, but the toes were too tight. Then I bought the same fin in size 9.5 to 10 US. My toes feel good, but my foot is a little too loose in the fin. I am fluctuating between the two sizes until I figure out which fits best for my foot.

The only reason I am not giving these a 5 star is that they're not 100% comfortable, but is any fin? But they are comfortable enough to easily swim 1,250 yards in them. They stay on perfectly. I haven't used swim fins for over 40 years, but was thrilled when I put these on and felt instant speed and power. I really think these fins have helped my leg strength and kick. I don't know how durable they are yet, as I have only had them since July 8, but so far so great! I love the fun colors available! I chose the lime green. Concerning sizing, if your feet fit snugly in them, that's ok! You're not walking in them! I wear a 9.5-10 in women's, ordered the men's 8-9 as was suggested, and they fit great kicking in the water! And the price was reasonable as well, compared to other fins. I definitely recommend them.

Excellent, I've had them for 3 years, I swim every day and they haven't lost any of their shape, highly recommended and the size is very true to the description. Excelentes, tengo 3 años con ellas, nado todos los dias y no se han descastado nada, super recomendadas y la talla es muy fiel a descripcion.

These fins are some of the best on the market. The open heel allows you more flexibility and mobility while kicking. Fins aren't too heavy to prevent drag and they aren't too long so you can still kick tight and fast while sprinting. The only thing to make sure is that you get the correct size. They run true to size and the area where your toes go tapers down towards your pinky toe. My son has these fins as well and for his foot the second toe is longer than his big toe so it contacts the end of the open space. it does not rub or cause issues but can be a problem for some people since the only opening is for your big toe.

The fins seem to be of very good quality yet they are heavy: 1 lb per fin, which is probably good. They are smaller than they appear in the pictures on Amazon site. However, the main issue for me is the sizing and not much comfort when using them. I wear size 9.5-10 US yet the size 9.5-10.5 is very tight on my feet. For one, there is not enough room (at least for me) in the instep, or, they are very tight in the instep. That's probably good because they fit tightly. But the main issue is with the vertical room for the toes: there is not enough of it, at least for me. I have tested these fins in the pool. They do have plenty of power, which is very good, yet after a few pool lengths, I had to take them off since my toes were hurting badly due to mostly not enough vertical space to accommodate them. Thus, I will ask for a larger size. Also, I received a different color than the one I had ordered, which is not such a big deal. The main issue is the fit. I will update my review once I test the larger size.

These Arena fins are in Men’s sizing. My fins in the photos are a USA 8-9, EU 40-41 which is a Women’s 9-10 (Men’s 8) in the United States. They’re tight when you try them on dry, but perfect once you get in the water. I am a Medium width foot. I wear an Adidas tennis shoe in women’s 10 and a 9.5 in any brand sandal. I’m a 10.5 Asics or Nike tennis shoe. They will fit an American woman size 9-10 or American man 7.5-8.5. I would size up if you’re a women’s 10-11. They’ve been worn for competitive USA Swimming training 6 days a week in a chlorine pool for a year with no fading, no deterioration of the rubber, and no stretching. I would buy these again! I had the Arena Tech Pros before I purchased these - these are slightly heavier than the Tech Pro - love them both. They are a thick, structured rubbery silicone material (not hard plastic). They are worth every penny for Arena quality. The pink is a fabulous HOT pink with the black Arena logo. They have not chipped or faded in a year!

After a few swim sessions I've gotten used to the fit and feel of these fins. I wear a US 12 shoe and the 11-11.5 size fins are perfect. Good and snug, with my big toe just poking into the toe hole. So far I'm not seeing any rubbing or irritation. These feel like a pretty heavy kick, but I think that feeling will diminish as I train with them and get stronger. For reference, the photo shows the Arena fins compared to DaFin's Pro fins. Those DaFin Pros are a super heavy kicking fin, not suitable for long distance swimming, at least for me.

My third pair of swim fins ordered and these are the winner. The first two were either too tight or too loose, but these were just right. I get the Goldilocks thing, but being able to wear this pair in the water and know that they are secure without tearing into the skin around your ankle or falling off when pushing off the wall is kind of a big deal. Easy to get on a take off.