Our Summit Racing™ CarbonX shifter boots are built with a CarbonX outer shell and aluminized inner material. They also feature flame-retardant Velcro® and are double-sewn with KEVLAR®/stainless steel thread. Now, that's one tough shifter boot! Summit Racing™ offers CarbonX shifter boots in various size applications, with or without the SFI rating. Get quality, performance, and value with Summit Racing™.