The inner layer cushioned from heel to toe and Dri-WRIGHT™II performance yarns added in outer layer provide maximum protection from blisters, added comfort and durability while hiking, trekking, trail running or backpacking. Dri-WRIGHT™ II performance yarns improve moisture management and added durability Stabilizer Zone™ to help lock sock in place Mesh panel for breathability Our heaviest outdoor product Blister Free socks - No Blisters, Guaranteed Fiber ContentInner Layer: 70% Dri-Wright® II Polyester, 26% Nylon, 4% Lycra®Outer Layer: 74% Dri-Wright® II Polyester, 20% Nylon, 6% Lycra®