Darn Tough Coolmax® Hiking Socks are comfortable and durable. These socks have been tested on long trails all over the globe. Made with 100% synthetic material, this sock is a nice option for anyone with a true wool allergy. The Coolmax® yarn is moisture wicking and fast drying. This sock is a medium weight cushion. Nice amount of cushion everywhere on the sock except the top of the foot - that stays light-weight cushion. A favorite of hikers who like a well-cushioned sock. This sock will peek over the top of a standard boot. All Darn Tough socks are made in the USA and backed by Darn Tough#39;s Lifetime Guarantee. Specs: 37% Nylon 34% Coolmax Polyester 26% Acrylic 2% Lycra Spandex 1% Other Fiber