The Perfect Walking Sock! Anti-Blister System. Dri-Wright Polyester/Micro Safe Inner Layer. Acrylic Outer Layer. Flat Knit. Not Bulky. Inner layer is always Smooth, Undyed, Hydrophobic and Antibacterial. Fully Cushioned Foot. Welt Top Construction. Two Year Guarantee. Content: Inner Layer - 55% Dri-Wright Polyester, 15% MicroSafe, 30% Nylon Outer Layer - 72% Hi-Bulk Acrylic, 24% Nylon, 4% Lycra |