Key Features:Made with 75% ultra-wicking M.D. Acrylic, 15% Nylon and 10% Spandex for exceptional comfort and strength. ,All of our socks feature our \"stretch-to fit\" sizing system and our 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. ,We also feature a double stitched heel & toe for added strength and durability.,We deliver superior quality and high-tech comfort in every SockGuy sock we make. We guarantee it.,Cuff Height : 3\",Size: S/M (4.5-8.5) L/XL (8.5-12.5).