Arai XD-5 Discovery Helmet. Shell: The forehead area of the shell is reinforced by a super-fiber belt which is similar to the way in which bands strengthen a barrel. PB-cLc2 shell is assembled using an assortment of materials. VAS-A shield system lowered to further improve 'glancing off' ability. Peak: Designed for more effective ventilation, increased high-speed flow-through performance, greater range of adjustability for blocking the sun, and is more resistant to buffeting, all of which leads to an overall more comfortable riding experience. VAS-A Shield System: The shield can be attached or removed without the need for any tools. Allows for easier and faster shield swaps. The peak utilizes only one screw on each side for removal / installation. Mouth Shutter: