Castelli Estremo ShoecoverThe Estremo is Castelli's warmest overshoe to date, a double layer of fleece and windproof GORE-TEX INFINIUM™ locking down warmth and not letting it go.  The Estremo Shoecovers' first layer of protection is via GORE-TEX INFINIUM™ fleeced-backed windproof fabric, it prevents even the iciest of winds from penetrating inside but it's also remarkably breathable to keep the temperature regulated. Next comes a layer of Polartec® Power Stretch® Pro™ fleece offering unrivalled insulation against the cold and yet with minimal bulk. With their high cuffs the Estremo offers extra warmth up to the calf and with an excellent level of water-repellency, they also keep road spray at bay. If you love to get out riding, even in more extreme cold weather conditions, then these overshoes are for you.Features:Material: 100% PolyesterCastelli's warmest shoecover for extreme conditionsGORE-TEX INFINIUM™ fabric for windproof water protection with maximum breathabilityPolartec® Power Stretch® Pro™ lining to keep you warmReflective details provide high visibilityYKK® AquaGuard® zipperHigh-durability material under footSuggested Temperature Range: -10 to 5 Degrees CBuy Castelli Clothing from Chain Reaction Cycles. The World's Largest Online Bike Store.