Dual Pane SAI visor for Arai helmets. Suitable for RX-7V RX-7V Racing RX-7V Evo Quantic QV / QV-Pro Chaser-X Renegade-V Profile-V Properties VAS-V Dual Paned Variable axis system (VAS) With VAS, the position of the visor attachment is lowered, giving an average of 24 mm more over both panels to achieve the ideal, smoother shape that increases the ability to radiate energy. Dual Pane (double glazing) A thin layer of air between two visor lenses prevents the visor from fogging up while riding, especially in cold weather.