The Nike Performance Cushioned Crew Sock has a contoured fit and cushioning for lasting comfort on every step. Close Fit Rib System creates a fully contoured snug fit through forefoot, heel & ankle. Y-Arch compression supportive arch construction locks down the mid-foot. Thicker cushioning around the forefoot for impact cushioning & dexterity. Dri-FIT fabric pulls away sweat to help keep you cool and comfortable. Anatomical left and right socks for superior fit.