Atomic’s Holo Core increases shock absorption by up to 30% above the industry safety standard and in-mould construction keeps weight to a minimum. The 360o Fit System, as well as an adjustable bungee liner, will ensure the helmet is secure and comfortable.Size guide:X-SmallSmall48-52cm51-55cmVenting: PassiveSizing system: AdjustableWeight: 350gConstruction: In-MouldSafety standard: EN 1077 Class B, ASTM F2040Additional safetyHolo Core - This unique ‘egg-carton’ construction creates an extended crumple zone for maximized shock absorption. It also comes with ventilation holes so it’s cooler and lighter. This means up to 30% higher impact protection than industry safety standards require.VentingPassive Aircon venting is a built-in system without adjustment. Basic but effective, it creates a constant airflow over your head all day long, keeping you cool without making you freeze.Sizing systemThe 360° Fit System lets you fine-tune your helmet from every angle. The dial at the rear quickly and easily adjusts to match the size of your head. And the system is also height adjustable so you can find the perfect fit for the shape of your head.The Ear Fit System is a special ear pad closing system used for Atomic’s junior helmets that works with a drawcord, keeping the ears warm and protected.ConstructionIn-mould helmets are constructed directly in the mould. The EPS foam is moulded directly into the PC shell, which results in a safe, low bulk and lightweight helmet.Other featuresRemovable and washable full cap liner.Strap Station to keep goggles securely in place.