Gill Waterproof SockThe Gill Waterproof Sock is constructed with a durable nylon outer shell with waterproof and breathable membrane reduces the build up of perspiration. While the inner thermal component of the sock is moisture wicking capable. Thin enough to be worn inside boots and performance footwear alike.Features:Waterproof, windproof, and, breathableDurable Nylon outer shellThermal inner sock with moisture wicking capabilityThin enough to be worn inside boots and performance footwearHigh performance waterproof and breathable membrane