32% Merino Wool, 31% Rayon from Bamboo, 32% Nylon, 5% Spandex Made in USA RECOMMENDED FOR: Everyday activities including walking, running, hiking, biking and sports. Improve your performance and recovery quickly with the best fitting compression socks on the market. 4 ZONES OF MODERATE (15-20mmHg) GRADUATED COMPRESSION: Energizes your step and recover quickly. Helps to reduce fatigue and soreness, and minimizing swelling. Soothe tired feet and legs. PERFORMANCE FEATURES: Accu-fit Technology, Graduated Compression, Turn Welt Top, Arch Support, Breather Panel, Seamless Toe Closure, Ultra Light Cushion Sole HIGH PERFORMANCE YARNS: Provides natural moisture management, odor control, thermoregulation and durability. SIZES: Small/Medium fits women’s US shoe size 4 ? 7.5, Size Medium/Large fits US shoe size 8 ? 11. Sock length fits over the calf.