The SockGuy Women's 1" Cuff Sock is made with 75% Ultra-wicking M.D. Acrylic, 15% Nylon, and 10% Spandex for exceptional comfort and strength. ALL SockGuy socks feature their "Stretch-to-Fit" sizing system and their exclusive "Easy-Fit" cuff for a PERFECT FIT every time on any foot. These features create superior softness and comfort and help eliminate blisters and hot spots. SockGuy also features a double stitched heel and toe for added strength and durability. SockGuy delivers Superior Quality and High-Tech Comfort in every sock they make. They guarantee it.