Light on weight but not on protection, the 1500-gram SE4 Polyacrylite incorporates the Mips® brain protection system with safety features such as 3D cheek pads designed for emergency removal, break-away plastic visor screws, and an EPP chin bar. With 16 intake ports channeling airflow through 6 exhaust ports, SE4 continues to be at the head of the pack for safety and comfort. MIPS brain protection system, reduces rotational forces to the brain. EPP (Expanded PolyPropylene) chin bar for lightweight, durable protection. Three shell sizes to more accurately fit a variety of head sizes and rider ages, improving overall safety. Anatomical 3D contoured cheek pads with emergency release system for EMS responders. Plastic visor screws and brass inserts for easy impact break-away. Stainless steel D-rings are both light and strong. Comes with TLD helmet drawstring sock.