20 percent Smaller with equal protection as the bulky competitors This helmet features significant intake venting and incredible Venturi venting for the rear exhaust One button release mechanism for front chin bar.ECE and DOT Certified Bluetooth 2.0 technology allows you to receive and send calls, listen to streaming music in stereo, as well as listen clearly to GPS directions Meet Federal Motor Vehicle Safety Standard (FMVSS) 218, 1 Year Manufacturer Warranty