The original Sealskinz waterproof ankle length cycle oversock is lightweight and streamlined. Designed for use with cleated cycling footwear making them suitable for both road cyclists and commuters in a wide variety of weather conditions. Waterproof - three layer construction for warmth, durability and waterproofing Visibility - Reflective detailing for added visibility in low light conditions Close fit - Four way stretch for comfort and stretch MaterialsOuter: 93% Nylon, 7% Elastane Membrane: Aquasealz Inner: 52% Polyester, 27% Cotton, 21% Elastane