With an inner lining crafted from Merino Wool, these Waterproof Cold Weather Socks from SealSkinz provide excellent insulation and regulate temperature, making them perfect for cold weather situations. A three-layer construction makes these socks 100% waterproof, windproof and breathable for all day comfort. Waterproof - Three-layer construction for warmth, durability and waterproofing Comfort - Merino wool lining for moisture control, insulation and comfort Support - Zonal elastication for added support Close fit - Four-way stretch for comfort and stretch fit Comfort - Flat toe seams prevent rubbing Footbed Comfort - Additional footbed padding reduces pressure and absorbs shock