DESIGN & TECHNOLOGY: Ski and snowboard helmet Advanced angled impact MIPS® protection Zonal Koroyd® coverage for lightweight, energy-absorbing and ventilated impact protection Adjustable venting Lightweight in-mold construction fuses the exterior shell and EPS foam for a one-piece design that's lightweight and durable. AirEvac™ ventilation system keeps air flowing for fog-free lenses VaporFit™ dial system offers 270-degree fit adjustment Removable audio-compatible earpads Regulator climate control allows easy, one-handed vent adjustmentXT2® antimicrobial lining offers sweat-activated odor control Weight (size M): 16 oz/450 g Style: E0050809B5155 SIZING: We recommend you try helmets on before buying. Make sure the helmet fits with a little room when the fit system is loose, and sits low enough to protect your child’s forehead without hindering vision. Once you’ve got the right size, you can adjust the fit.