The Darn Tough Waves Crew Light Cushion Denim lets you channel your love of water. It has a light and strong thin layer of cushioning along base of foot. The naturally antimicrobial sock is an all-weather performance sock. It is made of 50% Merino Wool, 48% Nylon and 2% Lycra® Spandex. The sock features a performance fit, fine gauge knitting, fast action wicking and True Seamless™ for an ultra-smooth, invisible feel. All Darn Tough socks are made in Vermont, USA and carry a lifetime guarantee.