The Waterproof All Weather Hydrostop sock from the renowned brand Sealskinz, is the original and 100% waterproof, windproof and breathable sock with Hydrostop. The sock is made up of three layers that provide warmth, durability and of course make it 100% waterproof. In addition, the sock has "Moisture Control", which means that it directs sweat away from the body and causes it to evaporate, thereby keeping the feet dry and comfortable. This sock also offers Hydrostop which is a seal between the sock and the leg that stops water from above which would otherwise smoke into the sock.