The Radiator Sleeve by TWIN AIR is made of a nylon-coated fiberglass material. This prevents the ingress of dirt, sand, and mud into the radiator, thereby protecting it from overheating. The sleeves are simply pulled over the radiator fins (which need to be dismantled), and the elastic bands ensure a secure fit. The TWIN AIR Radiator Sleeves are available for many common motorcycle models from KTM, HUSQVARNA, GASGAS, KAWASAKI, HONDA, YAMAHA, SUZUKI, etc. The package includes a pair of sleeves (left and right). They are an essential component for any serious rider looking to protect their engine and maintain optimal performance in various riding conditions.