The lightweight construction of the Nike Elite Anti-Blister Sock brings a snug fit with less bulk. Dri-FITŪ fabric pulls sweat away to keep your feet cool and comfortable. Teamed up with ventilation holes, this sock gives greater air circulation and keeps you dryer. Low-friction construction reduces rubbing over the heel and toes. These two areas are also reinforced for greater durability. Sock is 59% polyester/38% nylon/3% spandex. Imported. Sizing: M fits Men's shoe size 6-8 and Women's shoe size 6-10. L fits Men's shoe size 8-12, Women's shoe size 10-13.