LS2 Helmets Storm full-face motorcycle helmet offers the performance and features of helmets costing two to three times as much, but because LS2 build it in their own factory, LS2 is able to offer it at an incredible value. The shell is uses LS2 s proprietary KPA. It s light, but strong. Easy to use and fully adjustable top vents are ported to allow true flow through ventilation. Outer shell Aramid reinforced polycarbonate (KPA) 1400 gr. ± 50 gr. 2 shell sizes Oval fit Homologated ECE 22.05 Lining Foam padding laser cut Removable and washable High-quality comfort lining Antiallergenic Wind deflector in the chin area Visor Integrated sun visor Quick release system Scratch resistant UV-resistant Pinlock MaxVision lens included Ventilation Top ventilation Chin ventilation Air vents Breath deflector Safety Metal quick release buckle Impact absorbing EPS inner shell Reflective sticker Visor LS2 visors are built with 3D Optically Correct "A Class" Polycarbonate, a space-age polymer with high resistance to impact, that avoids distortion and offers maximum clarity. Security To ensure good protection the helmet must fit your head to perfection, special attention should be paid to the shell shape design and materials to minimize the effects of a possible impact. It is key to obtain a perfect fit to your head from outside to inside, as well as the shell, the configuración of the EPS liner, which should match closely the human head shape.