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, breathable; Durable Nylon outer shell; Thermal inner sock with moisture wicking capability; Thin enough to be worn inside boots and performance footwear; High performance waterproof and breathable membrane;