30% Merino Wool, 30% Rayon From Bamboo, 35% Stretch Nylon, 5% Spandex Made in USA RECOMMENDED FOR: The world’s best casual socks for every day activities. Live, work and play in comfort. PERFORMANCE FEATURES: Our Accu-fit Technology delivers comfort all day long with a soft, snappy fit. COMFORT FEATURES: Accu-fit Technology, Soft Turn Welt Top, Y-heel Construction, Seamless Toe Closure, Non-Cushion. 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.