Big is best – and this is also true for descending windows. The larger the achievable descend- ing window, the more impressive the effect when open. The new descending window also impresses with its unique air-lux pneumatic sealing system. The continuous, inflatable ring seals match the movable pane element and close the gap between the pane and the fixed components perfectly, providing guaranteed 100% impermeability against driving rain, wind and noise.