Bamboo Full Cushion Hiking/Outdoor Crew Socks | Keep Your Feet Dry | Odor & Blister Free. 70% Viscose from Bamboo, 25% Polyester, 4% Rubber, 1% Spandex SIZE: Large - Men Shoe Size 9-12, Women Shoe Size 10+ (Sock Size 10-13) Ultra-Soft - Full Cushion FootBed Provides All-Around Comfort Integrated Smooth Toe Seam To Reduce Friction Arch Support - Keeps Sock in Place & Fights Foot Fatigue Bamboo Viscose Breathes to Regulate Temperature, Naturally Anti-Microbial, & Hypo-Allergenic