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.