The TWIN AIR Radiator Sleeve is constructed from nylon-coated fiberglass material. This design prevents dirt, sand, and mud from entering the radiator, protecting it from overheating. The sleeves can be easily slipped over the radiator fins (after removing them) and are securely held in place with elastic bands. The TWIN AIR Radiator Sleeves are compatible with many popular motorcycle models from KTM, HUSQVARNA, GAS GAS, KAWASAKI, HONDA, YAMAHA, SUZUKI, etc. Each package includes a pair of sleeves (left and right).