This french terry bamboo material is super soft and thick. Bamboo fiber is known to be anti-bacterial, odor-resistant, and bio-degradable. The socks are constructed with heavy duty double cushion sole and flat stitch toe seam for maximum comfort. You get two pairs of socks with this purchase, one in black color and one in gray. Men's one size, to fit up to shoe size 13. 85% Bamboo fiber 15% Spandex. Machine wash, tumble dry low.