The Zamp RZ-44 Carbon Helmets are designed to be lightweight, aerodynamic helmets. The Zamp RZ-44 Carbon Helmets feature a maximized air flow system. These helmets feature openings on the top and BOTH sides of the chin bar, allowing you to fully customize the air flow of this system. The standard style Zamp RZ-44 Carbon Helmet features open vents on the top and sides of the chin bar. The forced air style Zamp RZ-44 Carbon Helmet features forced air ports that can be placed on any of the three air ports (or all three of the air ports!), providing you with a completely customizable air system to fit your vehicle perfectly.