The SealSkinz Waterproof All Weather Mid Length Sock With Hydrostop is a 100% waterproof, windproof & breathable mid-length sock featuring Hydrostop. Perfect for use in a wide variety of weather conditions.SealSkinz Waterproof All Weather Mid Length Sock With Hydrostop Highlights-Waterproof - three-layer construction for warmth, durability and waterproofingComfort - Merino wool lining for moisture control, insulation and comfortHydrostop - Reduces water ingressSupport - zonal elastication for added supportComfort - flat toe seams prevent rubbingComfort - Footbed padding reduces pressure and absorbs shockHydrostop Usage Guide - SealSkinz Hydrostop technology creates a seal between the sock cuff and skin, helping to reduce the amount of water from running down the leg and into the sock ... More info