Cariloha Bamboo Striped Boot Socks - Buy 3 Get 1 Free S/M: Size 5-8 L/XL: Size 8-12 85% Viscose from Bamboo, 10% Elastane, 5% Nylon S/M: Size 5-8, L/XL: Size 8-12 75% Viscose from Bamboo, 15% Nylon, 10% Spandex