HCI Carbon Fiber Motorcycle helmets and sales. When it comes to Carbon Fiber Motorcycle Helmet technology, HCI is true carbon fiber construction. First a layer of fiberglass, then the Carbon Fiber cloth is layed on. Finally, the brilliant gelcoat is applied and buffed to a gloss shine. It weighs about 0.5 pounds less than the average half-helmet. It's also the lowest profile available in Carbon Fiber DOT, FMVS 218, motorcycle helmets. These are not look-a-likes they are true Carbon Fiber construction.