Color:Patriot Black The Klim Viper/Viper Pro redefines the riding experience on the snow. The Viper is engineered to provide the best optical clarity, vision, field of view (F.O.V.) and fit experience. Ventilation and moisture management systems aggressively combat fogging. Integrating a super-thin frame design, the Viper is compatible with a wide range of open-face helmets.