80% Cotton/ 15% Nylon/ 5% Spandex Size guide: US Shoes Size,Men’s 6.5-11.5. As these sport compression socks are dri fit socks,so the size is a little tight.Dri-fit fabric helps to keep feet dry, Soft and Comfortable, Technology : soft Comfortable Compression starting mid foot for plantar fascia and arch support, Lightly padded at the heel and toe, eliminate abrasion and foot stress. Deep heel cup keeps socks from sliding down, perfect fit your foot, Dri-Fit fabric moves sweat away from your skin,keep your feet dry and comfortable. Toe Reinforce And Arch Design: Reinforced heel and toe for enhanced durability in high-wear areas;Arch compression adds support and stability to reduce foot fatigue, provide extra blister protection. Multi-Function : High quality socks are suitable for different occasions, It has Cushioning system.It’s Cushioned Basketball Football Baseball Soccer Athletic Socks and can be used in any cold weather areas is fashionable!Can be used when hiking, outdoor sports and daily use Keep your socks strong, soft and comfortable by hand washing them after use. Avoid machine washing or ironing and you’ll extend the life of your socks exponentially.