The SealSkinz Worstead Waterproof Cold Weather Knee Length Sock is a 100% waterproof, windproof & breathable knee length sock. The inner lining is crafted from fine Merino Wool to insulate and regulate temperature making this perfect for use in colder weather conditions.SealSkinz Worstead Waterproof Cold Weather Knee Length Sock HighlightsFOR KEEPING THE ELEMENTS AT BAY The iconic waterproof sock beefed up to tackle the cold, and, at a length that will keep you dry and on the move. Wet and cold feet are definitely no fun and can lead to all sorts of not-so-good things outdoors, including numbness, blisters, and frostbite. These socks will keep you warm and dry in rain, snow, and mud while the knee length will give you that added extra bit of protection ... More info