F3 Carbon Pro Helmet. The F3 Carbon Pro Helmet is engineered specifically to reduce fatigue and improve comfort, and ultimately to reimagine what "lightweight" and "safe" really mean. Koroyd® is a next-gen energy absorbing technology, engineered with a unique structure and innovative energy management properties. When impacted, the Koroyd® cores crush homogeneously, decelerating energy from an impact in a controlled manner. A custom visor design improves FOV while improving aerodynamics and strength. Built with ultralight hand-laid carbon fiber for the best consistency in shell thickness and resin distribution, F3 Carbon Pro is the lightest ECE moto helmet to carry this level of impact protection. Construction: Carbon fiber hand-laid shell. Shell construction process avoids deposits, imperfections and excess weight. One of the lightest, safest moto helmets available.