SPECS: 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. DESIGN & TECHNOLOGY: Ski and snowboard helmet Advanced angled impact MIPS(R) protection Lightweight design 9 fixed vents Lightweight in-mold construction fuses the exterior shell and EPS foam for a one-piece design that's lightweight and durable. AirEvac(TM) ventilation system keeps air flowing for fog-free lenses Removable Snapfit SL2 ear pads for added warmth Removable goggle strap lock for streamlined shell when goggles are worn under helmet Outdoor Tech(TM) audio system compatible