A car cover is a contoured fabric shell designed to protect the vehicle when parked. It shields the paintwork from harmful UV rays, bird droppings, and tree sap. High-quality covers are made from multi-layered, breathable fabrics that allow trapped moisture to escape, preventing mold and rust. They typically feature elastic hems and buckle straps to secure the cover against high winds. Using a cover significantly reduces the frequency of car washes and protects the interior from sun damage.