Our new SE4 Polyacrylite Helmet comes with MIPS, incorporating brain rotational protection. This 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.