Our thinnest, lightest and most aerodynamic shoe cover now available in Screaming Yellow is perfect for racing or riding in cool, windy conditions. It’s made with a breathable PRO Barrier Lite fabric that stretches to optimize your aero advantage while keeping your feet dry and comfortable. It also features a zippered rear closure for improved aerodynamics PRO Barrier Lite fabric provides lightweight wind protection and water resistance Wind tunnel tested for aerodynamics Zippered rear closure for improved fit and class leading aerodynamics Recommended for road shoes with external cleats Weather forecast: Cool and wet Temperature range: 10 to 20 degrees Fabrics: Body made of 50% nylon 40% polyurethane 10% elastane and Bottom of 59% nylon 25% Kevlar® aramid 16% polyurethane