Seirus Innovation 2905 Windproof and Water Resistant Stormsock nylon The Stormsock is made from patented technology from Seirus Innovation Weathershield Weathershield Tri-Laminate is an exclusive design using tri-laminate fabric to keep your feet warm and dry WeatherShield Tri-Laminate uses a three layer defense: 4-way stretch outer layer, WeatherShield windproof/waterproof breathable membrane, and wicking inner lining The material of the Stormstock is both windproof and water resistant protecting your feet from the elements! Perfect for all footwear and outlasts ordinary socks 3 to 1!