The LS2 Assault helmet is made from Kinetic Polymer Alloy to give it a strong lightweight shell that is aerodynamic. Underneath this strong shell lives a multi-density eps liner to combat impacts and disperse the energy away from your head. Large, adjustable vents on the chin bar and at the top of the helmet work in conjunction with the rear spoiler and side venturi vents to offer adjustable, dynamic flow-through ventilation.; 2 Shell sizes Kinetic Polymer Alloy (KPA) shell Multi-density EPS liner Pinlock ready Drop down sun shield Removable and washable liner Laser cut cheek pads D.O.T. approved