NIKE Performance Cushion Quarter Socks with Bag (6 Pairs) 79% Cotton/19% Polyester/2% Spandex Dri-FIT technology helps your feet stay dry and comfortable Compression arch band provides soft support Contains 6 pairs of socks (12 socks total) Sizing for women: Small (4-6), Medium (6-10) & Large (10-13) Sizing for men: Medium (6-8), Large (8-12) & X-Large (12-15)