Thorlos Experia Women's Thin Padded Running Low Cut Socks 100% Other Fibers Made in US No Closure closure Machine Wash Specially sculpted Thorlos padding in the ball and heel made with THORWICK COOL provides maximum moisture wicking, protection and comfort Constructed with THOR WICK COOL fibers for superior moisture-wicking for drier, cooler feet. Ultra-lightweight socks frame with an aero Ultra-lightweight socks frame with an aerodynamic glove-like fit. Achilles tendon pad protects against rubbing and chaffing while functioning as a heel lock. Made in Statesville, North Carolina, USA 66%THOR-WICK COOL Polyester , 20%nylon, 13%polyester 1%elastic