Unisex; 52% Ultraspun Polyester/45% Nylon/3% Lycra Spandex; Comfortable Seamless Toe; Temperature Regulating For Cool And Comfortable Feet; Light Cushioning For Maximum Comfort Without Bulk; Arch Support To Reduce Foot Fatigue; Double Welt Top For Comfortable Stay Up Fit; Size Medium Fits Shoe Sizes: 6-9.5; Large Fits Shoe Sizes: 10-10.5; Color: Gray; Style #2796