The TWIN AIR Radiator Sleeve is made of a nylon-coated fiberglass material. This prevents dirt, sand, and mud from entering the radiator, thus protecting against overheating. The sleeves are simply pulled over the radiator fins (which must be disassembled first) 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 one pair (left and right).