Sizing Information: Medium: Equal to Women's shoe size 6-10, Men's 6-8 Large: Equal to Women's shoe size 10-13; Men's 8-12Product Details Breathable, comfortable knit material Crew length offers extended coverage Ribbed trim for a stay-put wear Dri-FIT technology wicks away unwanted moisture Durable reinforced heel and toe Classic Swoosh branding 61% cotton, 35% polyester, 3% spandex, 1% nylon Machine wash The Nike Everyday Plus Lightweight Training Crew Socks are imported.Overworked feet needs to be wrapped in comfort. The Nike Everyday Plus Lightweight Training Crew Socks bring a tech-driven design to a daily necessity. Powered by Dri-FIT technology, breathable, sweat-wicking yarns are knitted into a classic crew silhouette to deliver dry, fresh comfort. Built with a reinforced toe and heel for durability and ribbed wrapping for a supportive feel, these are the ultimate upgrade.