Using an ABS shell, Smith\'s Bombshell construction is tough and durable making it popular amongst freestyle skiers and snowboarders. Fixed vents provide plenty of airflow and AirEvac ventilation draws warm moist air away from goggles helping to keep your vision clear. Ear pads can be removed allowing a beanie to be worn underneath and the self-adjusting Lifestyle sizing system assures a comfortable and snug fit. Once you are finished with the mountains you can use the Scout on your bike or down the skatepark as it is designed for all-season use, certified for snow, skate and cycle.Size GuideSmallMediumLarge51-55cm55-59cm59-63cmClick here for more information on our Size & Fit GuideVenting: Passive Sizing System: Auto-adjust Weight: 450g Construction: Hard Shell Safety standard: EN 1077 Class B, EN 1078, ASTM F 2040Additional SafetyAll-season use - certified for both bike, skate and snow.VentingPassive Airflow ventilation utilises strategically placed vents for easy climate control in all conditions. Vent placement maximises airflow and heat exhaustion in warm temperatures while minimising undesired cold air drafts.AirEvac Ventilation allows goggles and helmets to function as one system, venting warm moist air away from the goggles, through the helmet climate control system and ultimately away from the head.Sizing SystemBuilt around the forgiving properties of elastic, the self-adjusting Lifestyle fit system is designed to flex around the wearer\'s head, providing a dynamic fit that will move as you do. Additional lateral adjustability on the fit system arms allows it to accommodate a wide range of head sizes. With the Lifestyle fit system, you\'ll experience comfort and mobility from a fit system you\'ll never have to think about.ConstructionBombshell construction uses an injection moulded ABS shell to withstand high-impacts and offer unparalleled durability, dent, and ding resistance. If you expect your helmet to be as tough as your truck, bombshell delivers.