The Quadtro Select allows the user to distribute the air in the cushion to their preferred sitting position. Setting the air is very simple and quick. The user simply sets on the cushion with the Flow Valve open and then closes the valve once the air has settled in the preferred locations. This “locks” the user into the cushion with a contour that exactly matches their body. The 2” Low Profile keeps the cushion low enough to give the user the optimum freedom of movement while seated.