The Hand Warmers have an outer layer of water-resistant 1000 Denier Cordura and are lined on the inside with anti-pill fleece. Reflective stripe is standard on the warmers. The hand warmers are universal fit and will fit most Adventure bikes both big and small. It is highly recommended that these warmers are used in conjunction with hand guards. The hand guards will keep the warmers from pressing in on the controls at highway speeds.