The Apex Kart Jacket from Simpson is designed by the company that invented racing safety in collaboration with Karters who know exactly what they need from a jacket. It was designed specifically for karting and quarter midgets. The ripstop CarbonX® sleeve provides heat protection and reinforcement in an area that is prone to heat and stress. An easy to wear rear tuck flap keeps the jacket from riding up during action periods but still looks great out of the kart. The Simpson Apex Kart Jacket is manufactured from 500 denier material and is not fire retardant.