The Castelli Dinamica Womens Shoe Covers will keep your feet toasty even on the coldest of winter daysat once fully windproof, highly breathable and offering high-grade water protection these are a must-have piece of kit if you run cold or face frosty starts.All-new and updated Gore-Tex Infinium X-Fast fabric offers unrivalled, high-grade water protection, keeping you dry when you encounter those inevitable rainy showers, and crucially gives you full windproof protection. Despite its protective properties, Gore-Tex Infinium is also breathable meaning that your feet remain at an optimal temperature, even when the surrounding temperature fluctuates.The fleece-backing of the Gore-Tex Infinium X-fast fabric has an optimal loft, trapping air just above your skin whilst aiding with moisture management.The YKK AquaGuard zipper is primed to protect you from wheel spray whilst the overall height gives even more foul-weather protectionthe silicone grip at the top of the cuff helps to seal