1000 Mile Walking Sock With Cupron - SS18 56% polyester Cupron - Anti-odour. Anti-bacterial. Anti-fungal. Arch bracing - For additional support. Padded toe, ball and heel zones - Underfoot comfort and impact protection. HeelPower design - Grips the heel firmly in place. Material - 56% polyester, 23% nylon, 14% cotton, 6% Cupron, 1% spandex.