Adidas Socks Unisex Energy Running Single Mid-Crew Socks 87% Nylon/13% Spandex Compression throughout foot for secure fit and greater stability Targeted cushion zones in the toe and forefoot to reduce blistering and friction Left/right specific for more of a comfortable fit Traxion heel to control slipping Climalite moisture-wicking keeps your feet dry from sweat Small fits women's shoe size 5.5-7.5 Medium fits men's Shoe size 6.5-9, Women's Shoe size 8-10.5 Large fits men's Shoe size 9.5-12, Women's Shoe size 10-12+ Matches to adidas apparel and footwear colors