The Darn Tough Work Steely Boot Cut Sock offers all-day comfort, durability and legendary Darn Toughness. Thismen's sock features high density cushioning on its foot base and shin to provide a supportive feel. The true Seamless construction makes which makes it irresistibly comfortable. It has a full cushioned toe box for added comfort. The sock comes with an unconditional lifetime guarantee. It is made of 56% Merino Wool, 41% Nylon, and 3% Lycra Spandex.