MIPS (Multi-directional Impact Protection System), is a revolutionary technology that lets the helmet slide relative to the head, adding more protection against rotational violence to the brain caused by angled impacts. Polyacrylite construction. EPP (Expanded PolyPropylene) chin bar provides lightweight, durable protection. Anatomically contoured 3D cheek pads with emergency release system allows EMS responders to easily remove cheek pads before removing the helmet. 16 intake ports channel cool air around and over a rider's head forcing hot sweaty air out through 6 rear exhaust ports. Plastic visor screws combined with brass inserts are durable while providing break-away protection. Stainless Steel D-rings are both strong and light. DOT certified. Includes Troy Lee Designs drawstring helmet bag. MIPS MIPS (Multi-Directional Impact Protection System) is a specialized helmet safety technology that is now being used in the top tier of off road helmets in order to greatly lessen the chances of traumatic brain injury. By integrating an engineered low-friction layer into the liner of the helmet, MIPS enables a relative sliding motion between the head and the helmet so angular and rotational impact forces are absorbed and deflected. Since most head impacts occur at oblique and unpredictable angles, helmets with MIPS Technology are able to offer better protection than helmets without.