SockTower Women's Men's Unisex Sports Athletic Cushion Thermal Ski Snowboard Socks Sock S=Men Shoe Size=4-6/ Women=3-6. Best to fit Foot= 7" to 9". FOOT LENGTH: Before Stretch= 6.5. After=8.5. CALF LENGTH: Before Stretch= 12.5. After=15.5 (try on model foot =8.5). Embedded Arch Support helps reduce foot fatigue. Elastic in foot arch- ensures perfect fits. Double Cushioned sole, toe and heel; Soft comfortable, absorption Lightweight.Thick, Warm, Extra padded triple Cushioned sole, toe and heel. 80%Thermolite, 10% Spandex. 8% Nylon, 2% Rubber, NON-TOXIC & ODORLESS MATERIAL. Fasten texture- Professional long-term use Quality, SIZE L= 3.1 oz= 88 g. SIZE S= 2.8 oz= 80 g USA Tax payer; Item located and ships from USA. Import/Made in Taiwan (manufacturer direct; premium standard of quality control)