VIO MIPS LED helmet. State-of-the-art MIPS safety technology and LED lighting 360˚ (200 lumens in front / 65 lumens on the sides and back): Exclusive and patented Exo-skeleton technology, making the VIO the lightest 360 LED helmet in the world Runtime of 3 hours. 3 oversized ventilation holes for maximum airflow 360° reflection. Fidlock magnetic buckle Xstatic anti-microbial pads Adjustable dial for a better fit Removable visor. S/M : 55- 59cm L/XL: 59- 62cm Two-piece molded construction with EPS Duo Density foam. A denser outer layer of foam protects against the first impacts and a softer inner layer protects the brain after the initial impact. With the Vio helmet, Nutcase offers a real power package. Its advanced LED and protective technologies, combined with its aesthetic and ergonomic design, make it the ultimate versatile helmet, to be adopted by every cyclist!.