Seirus Innovation 2905 Weathershield Stormsock - Windproof, Waterproof, Breathable Sock WATERPROOF AND BREATHABLE - Our exclusive Weathershield material offers a great combination of windproof, waterproof and breathability COMFORTABLE - 4-Way Stretch keeps your comfortable for all day wear WARM AND DRY - Wicking fleece lining is designed to keep your feet warm and dry DURABLE - Perfect for all footwear and outlasts ordinary socks 3 to 1!