Placement of using sound deadener mat:A.Hood B.Ceiling C.Door D.Cockpit Floor E.Tailgate F.Firewall and U Type Wall J.Front Fender H.Front and Back Wheels The surface high-fiber cloth is fiberglass. Heatproof .Block transmit sunlight, engine, exhaust pipe heat to the cab, reduce air conditioning energy consumption, saving fuel Slow down the life pipeline and circuit.In the summer, due to the hot weather, heat comes from the front cover of car,shortening the life of pipeline and circuit, accelerate cracking Slow down the car paint ageing.Because of hot weather, the front outer cover through the direct sun, high temperature inside and outside the engine, accelerated paint aging Keeps Heat In-Cold Out in the Winter, Keeps Cold in-Heat Out in the Summer.In the winter, the engine temperature is very high, but outside is very low when driving, which make car parts damaged easier, Manufacturer: Sourcingmap