Organic Cotton Bamboo No Show Socks Anti Slip Silicon Grip Unisex Bamboostan Shop 5 Pack Black Bamboo Ankle Socks in Black Accessories Taking Bamboo Socks by EcoSox Blister Free, Ultra Soft, Wicks Moisture Away. The perfect tennis or running sock, these full cushion, no show socks are knitted from the highest quality bamboo yarn. This results in a sock denser than other brands, offering unparalleled moisture absorption, cusion and comfort. Like all Spun Bamboo brand bamboo socks, this no look sock is super absorbent, moisture wicking, breathable, and will not harbor odor like synthetic based socks. 87% Viscose from Bamboo 10% Nylon 3% Spandex.Designed in California, made in China where bamboo grows.Unisex sizing:Small = Men's Shoe Size 4 5.5 Women's 5 6.5. Medium = Men's Shoe Size 6 9 Women's 7 10.5. Large = Men's Shoe Size 9.5 11.5 Women's 11 13. X Large = Men's Shoe Size 12 14 Women's 13+.