The original Sealskinz 100% waterproof, windproof & breathable mid length sock. Perfect for use in a wide variety of weather conditions. 100% Waterproof - three layer construction for warmth, durability and waterproofing Foot Comfort - Merino wool lining for moisture control, insulation and comfort Extra Support - zonal elastication for added support Close fit - four way stretch for comfort and stretch fit Toe Comfort - flat toe seams prevent rubbing Footbed Comfort - Additional footbed padding reduces pressure and absorbs shock Hand made and hand tested in UK MaterialsOuter: 62% Polycolon, 29% Nylon, 9% Elastane Membrane: Aquasealz Inner: 36% Merino Wool, 36% Acrylic, 18% Polyester, 5% Nylon, 5% Elastan