The Smith Network MIPS helmet is designed for anything on 2-wheels, whether it is in the city or on the trails this helmet will keep your head properly protected A matte black finish with vibrant green stripes on top of the helmet MIPS brain protection system, with a low friction layer allowing for 10-15mm of sliding movement, reducing rotational motion to the brain during impact Zonal Koroyd® coverage gives lightweight, energy-absorbing and ventilated impact protection 15 vent holes giving ample breathability, combined with built-in Smith optics integration for added comfort AirEvac™ ventilation system integrates with Smith eyewear for fog-free lenses Ionic+® is an antimicrobial lining that reduces odour from perspiration Adjustable, under-chin clip fastener Safety standards: CPSC and CE EN 1078 certified Sizing: S – 51-55cm M – 55-59cm L – 59-62cm XL – 61-65cm Smith Network MIPS Bike Helmet – Matte Mystic Green