Power Cushion Performance Crew Large 2 Pair Pack (Black) 70% Cotton / 19% Acrylic / 8% Nylon / 2% Polyester / 1% LYCRA spandex Made in USA Machine wash warm. Only non-chlorine bleach when needed. Tumble dry medium. Do not iron. Full cushioned foot Stay-up, comfort top Comfort toe seam Reinforced Heel and Toe Ultra Soft Cotton