Size medium fits Mens shoe size 6-8, Womens shoe size 6-10
Midfoot Compression Fit-Secure stable design helps keep socks and cushioning in place. Footstrike Cushioning (patent pending)- New, clearly defined pattern is even more closely aligned to pressure patterns on a runners feet. Dri-FIT fabric / Wicks away moisture to help keep feet dry and cool. Anatomical left and right / Superior fit and cushioning. Fits Mens Sizes 8-12.