SockGuy (Flying Pig)Made with 75% Ultra-wicking Micro Denier Acrylic, 15% Nylon, and 10% Spandex for exceptional comfort and strength. Features a "Stretch-to-Fit" sizing system and SockGuy's exclusive "easy-fit" cuff for a perfect fit every time for any foot. These features create superior softness and comfort and help eliminate blisters and hot spots. A double stitched heel and toe provides additional strength and durability. SockGuy has superior quality and high-tech comfort in every sock; guaranteed.