For more than a decade, The Nine has been a keystone staple in the Giro product line and is the product that started it all in performance snow helmets. There are three main components to a MIPS equipped helmet: the interior foam liner, the Low Friction Liner and an elastomeric attachment system between them. In an impact, the elastomeric attachment system stretches to allow the foam liner to rotate independently around the rider's head. Although the system only moves a few millimeters, Giro believes that helmets equipped with this technology can reduce the amount of rotational force that may be transferred to rider's brain in certain impacts. The new Nine MIPS features an updated, streamlined low profile design, Thermostat Control and a full array of functional features that have made the Nine MIPS, Giro's most enduring and poplular design.