Gill Waterproof Socks in Graphite The new Gill Waterproof Socks have been designed to provide simple and effective protection. This sock is not only super comfy, soft and provides warmth and insulation, but it is also waterproof - perfect for shore wear, sailing and other water sporting adventures. Designed to be thin enough to be worn inside boots and performance footwear. A marine or water sport enthusiast must have! Features   Waterproof and breathable. Durable Nylon outer layer. Thermal inner sock with wicking capability. Sizing   Small - UK3.5 - UK5  Medium - UK5.5 - UK8 Large - UK9 - UK13