Ideal for Motocross and Enduro lovers, the SE4 Polyacrilite motocross helmet by Troy Lee Designs is light and weighs 1500 grams. Featuring a polycarbonate outer shell, the SE4 Polyacrylite motorcycle helmet is equipped with MIPS technology. Weighing in at 1500 grams, our new Troy Lee Designs SE4 polyacrylite motocross helmet comes with mips, incorporating brain rotational protection. This motocross helmet comes with 16 intake ports to channel cool air around and over a rider's head, forcing hot sweaty air out through six rear exhaust ports. SE4 helmet features: 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.