HJC i 50 Helmet The HJC i50 incorporates the new SLID (Sliding Layer Impact Distribution) technology that helps to redirect energy-exerted impacts on the brain by reducing rotational acceleration caused by oblique impacts. SLID is located in the helmet interior and is an advanced gel material with flowable properties. This allows the layer to counter the rotational acceleration, like a slip, thus dispersing the impact when a multi-directional impact occurs. The HJC i 50 Helmet also sports a longer visor, protecting your eyes from the sun and any of that dreaded roost coming at you. Features: Advanced polycarbonate composite shell Lightweight, superior fit and comfort using advanced CAD technology Impact-absorbing, multi-density EPS liner Maximum range adjustable visor SLID (Sliding Layer Impact Distribution) air gel built into the liner improves comfort, softens impact effectively and manages multi-directional shock Large eye port for maximum visibility and superior goggle fit Aerodynamic rear spoiler ACS Advanced Channeling Ventilation System with 9 top and forehead intake vents that combine with 4 rear exhaust vents to provide flow-through ventilation that helps to pull heat and humidity up and out of the helmet’s interior SuperCool liner Liner and cheek pads are removable and washable Cheek pads are interchangeable throughout all shell sizes Nylon strap double D-ring retention system neatly secures the chin strap DOT and ECE approved Snocross application add Optional Cold Weather - BreathGaurd HJP 740-005 [TABS] Similar Options Goggles HJC Dirt Bike Helmets HJC Snocross Helmets All Dirt Bike Helmets All Snow Helmets Size Chart Size Head Measurement XSmall 53 - 54 CM Small 55 - 56 CM Medium 57 - 58 CM Large 59 - 60 CM XLarge 61 - 62 CM 2XLarge 63 - 64 CM [/TABS]