b'S 51-55 cm / 20.1 - 21.7M55-59 cm / 21.7 - 23.2L 59-63 cm / 23.2 - 24.8HELMETSS g: 230 / oz: 8.1Mg: 250 / oz: 8.8 L g: 280 / oz: 9.9CERTIFICATION: CPSC 12.03Egos23 VENTS DUAL DENSITY ERGO DIVIDERFIDLOCKTOTALRSR 11 BUGSTOPFREE PADSADAPTIVEFLOW THROUGHSIDE BUCKLES CLOSURE BUCKLE COMFORT FIT ADJUSTABLEPADDING WITHINTERCHANGEABLEAIRFRAME VENTILATION RETENTIONPROTECTIVECOMFORT BANDSYSTEM NET PADDINGHELMET COLORSINCLUDED: Microfiber pouch Free pads interchangeable RSR 11 Retention SystemPHANTOM BLACK MATTE WHITE MATTEHL 78 00 90 US | 300S HL 78 00 10 US | 300SHL 78 00 91 US | 300M HL 78 00 11 US | 300MHL 78 00 92 US | 300L HL 78 00 12 US | 300L SPARE PARTSBUG STOP FREE PADSRSR 11 Interchangeable padding with bug stop Interchangeable padding Retention System KitBlack Black Light Grey / BlackC0 00 04 75 | 20 C0 00 04 76 | 20 C0 00 04 59 | 1581'