The T5 Helmet features a lightweight polycarbonate shell with oversized intake and exhaust ports. The EPS liner is Eject compatible and features ventilation channels for increased breathability..1,370g lightweight polycarbonate shellRAM air cooling systemEject compatible EPS linerInternal EPS ventilation channelsFive intake and four exhaust ports.Removable/washable moisture-wicking comfort linerMeets or exceeds D.O.T. and ECE standards.