Giro Manifest Spherical MIPS HelmetWith Spherical Technology, best in class ventilation, deep coverage, and luxurious comfort, the Giro Manifest is one of the most premium trail riding helmets available. Among the Manifest's extraordinary features is Spherical Technology, which utilizes a ball and socket design powered by Mips, the market leading brain protection system that helps to reduce rotational forces. Spherical Technology allows the outer liner to rotate around the inner liner