Hjc Helmet Ep Valeco Matte Glossy Black 2024Features HJC helmets are tested in the laboratory as well as in real life to meet the highest quality standards. Coming from MotoGP race helmet design experience, HJC designers and engineers have become experts in aerodynamics and wind ventilated helmets. In order to achieve maximum ventilation, a technical adaptation of Bernoullis principle is applied to HJCs aerodynamically enhanced models. In mold is a method consisting in bonding the EPS together