Cariloha Women's Crazy Soft Trouser Sock - Buy 3 Get 1 Free! 15% nylon Simply add 4 pairs of socks to your shopping cart, and the discount will be added automatically! Moisture wicking properties and naturally odor resistant. Arch support and seamless toe. S/M: Size 5-8, L/XL: Size 8-12 75% Viscose from Bamboo, 15% Nylon, 10% Spandex