The RaceThermo X is suited for off-road riding and is an extra durable shoe cover that is waterproof, insulating and ideal for cold and wet winter days on the trails. The RaceThermo X incorporates the EUROBIKE Award winning technology, IntelliSeal: an ingenious technology that greatly enhances durability and fit. The RaceThermo X is made from 4 mm waterproof neoprene It protects your feet from dirt and sprays when riding in wet and cold conditions. Compatible with most types of pedal systems. The RaceThermo X shoe cover is featuring the new zipperless shoe cover design, that gives a perfect and snug fit around the shoe and calf, so water is kept out from the top and preventing water from penetrating through a zipper.