The Radiator Sleeve from TWIN AIR is made of a nylon-coated fiberglass material. It effectively prevents the entry of dirt, sand, and mud into the radiator, thus protecting it from overheating. The sleeves are easily slipped over the radiator fins (which must be removed) and secured with elastic bands for a firm hold. TWIN AIR Radiator Sleeves are available for many common motorcycle models from KTM, HUSQVARNA, GASGAS, KAWASAKI, HONDA, YAMAHA, SUZUKI, and more. The package includes a pair of sleeves (left and right).