Castelli Aero Race Shoecover Keep The Wind and Rain Out Shoe covers are a great way to stay warm and keep the wind and rain out while you're riding. The Castelli Aero Race Shocover does all this without any extra bulk. It is waterproof and non-insulated making it perfect for cool and wet conditions. It features a silicone bead at the inside top of the cuff to seal water out, and waterproof zipper, and high-durability material under the foot. Features Waterproof PU-coated stretch fabric keeps the wind and water out Non-insulated aero bootie for cool and wet conditions Silicone bead at the inside top of cuff to seal water out and a waterproof zipper Sizing Size Small Medium Large Extra Large XX-Large US Shoe Size4 - 78 - 910 - 1112 - 1313 - 14Men's Euro Shoe Size36 - 3940 - 4243 - 4445 - 4646 - 48 | Castelli | Aero Race Shoecover Men's | Size Medium In Black