AN ICON, MADE EVEN BETTERSPECS- Integrated Mips® brain protection system- Featherweight webbing with Slimline™ buckle- Ionic+™ anti-microbial paddingCONSTRUCTION- In-Mold polycarbonate shell with EPS liner- Thermoformed SL Roll Cage™ reinforcementFIT SYSTEM- Roc Loc® 5 Air MipsVENTILATION- 19 Wind Tunnel™ vents with internal channelingSUPER FIT™ SIZES- S 20”–21.75” / 51–55cm- M 21.75”–23.25” / 55–59cm- L 23.25”–24.75” / 59–63cm