Waterproof All Weather Cycle Oversock The original, 100% waterproof, ankle-length cycle oversock. Lightweight and streamlined, the Thetford is the ultimate oversock for cleated cycling footwear. Signature Aquasealz(TM) technology combines waterproofness with breathability, letting perspiration escape. Reflective detailing offers greater visibility at night. Polyester and nylon blend is soft and insulative, with a four-way stretch providing a close fit. The Thetford is the answer to non-waterproof cycling footwear, keeping feet aerated and dry. Outer - Nylon is extra durable and especially resistant to abrasion. Flexible and lightweight, nylon adapts to specific cycling cleats. Mid-Section - Aquasealz(TM) membrane is 100% waterproof and breathable, ensuring internal moisture does not build up in hat. Interior - Polyester and cotton lining is soft and warm, guaranteeing comfort wear after wear. Highly breathable and moisture-wicking. We want to inspire our community to stay outdoors longer. Thetford oversocks are fully waterproof, making cycling in wet conditions that little bit easier. Accessories are subject to rigorous testing before being put into production, guaranteeing the wearer complete protection against the elements. - Outer Layer - 93% Nylon, 7% Elastane - Middle Layer - Aquasealz(R) waterproof membrane - Inner Layer - 52% Polyester, 27% Cotton, 21% Elastane