Regatta Great Outdoors Womens/Ladies Blister Protection Walking Socks Coolmax, Cotton, Polyester The womens popular Blister Sock has a specially designed two layer construction that works to reduce friction on walks, hikes and rambles. Complete with an anti-bacterial finish and underfoot cushioning for long lasting comfort. 2% Elastane, 10% Polyamide, 15% Polyester, 35% Cotton, 38% Coolmax.