The TWIN AIR Radiator Sleeve is made from a nylon-coated fiberglass material that helps prevent dirt, sand, and mud from entering the radiator, thereby protecting it from overheating. These sleeves are designed to be easily slipped over the radiator fins (they must be removed for this) and are secured in place with elastic bands, ensuring a snug fit. TWIN AIR Radiator Sleeves are available for many common motorcycle models including KTM, HUSQVARNA, GASGAS, KAWASAKI, HONDA, YAMAHA, SUZUKI, and more. The package includes a pair of sleeves (left and right).