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 liner improves comfort, softens impact effectively and manages multi-directional shock Large Eye Port Maximum visibility and superior goggle fit Aerodynamic rear spoiler ACS Advanced Channeling Ventilation System Top and forehead intake vents combine with rear exit vents to provide flow-through ventilation that helps to pull heat and humidity up and out of the helmets interior SuperCool Interior Lining More comfort in dirt and off-road conditions Crown and cheek pads are removable and washable Cheek pads are interchangable throughout all shell sizes Nylo.