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: 42% Coolmax Polyester 42% Nylon 14% Acrylic 2% Lycra Spandex