Great water socks
I purchased these to replace a pair I had but couldn't find. I was nervous that these were ankle sock height since my other ones were crew sock height, but these turned out to work well. I use them for open water swimming / triathlon and although they are a little loose in the foot area (I was between sizes and advised to order up - I wear a women's size 8 1/2 and ordered a medium), they are snug enough around the ankle that they stay on without a problem. One benefit I discovered is that these are much easier to get on and off than the taller ones I misplaced, which is especially important during a race.