Description FEATURES - CPSC 12.03 Safety Certification - Fidlock Magnetic Buckle System - Adjustable RSR11 Retention System - Interchangeable Comfort Padding - WG11 Rotational Impact Protection - Ergo Divider Side Buckles   SIZE & WEIGHT SMALL Size - 51-55cm / 20.8"-21.7" Weight - 260g / 9.1oz MEDIUM Size - 55-59cm / 21.7"-23.2" Weight - 284g / 10.0oz LARGE Size - 59-63cm / 23.2"-24.8" Weight - 307g / 10.8oz   WHAT'S IN THE BOX - Helmet Microfiber Pouch - Free Pads - Bug Stop - Egos Helmet