The difference between a Quadtro Select and a standard ROHO is an extra valve located on the front of the Quadtro cushion that splits the cushion into four equal compartments. The valve can either be opened to allow airflow throughout the entire cushion or it can be closed to control airflow to the four specific quadrants. This allows you to customize the amount of air in each chamber. When the valve is open, air flows freely between quadrants and performs like a standard ROHO. The ROHO Quadtro Select Cushion is an excellent option if you require the ability to adjust air volume in each quadrant for positioning needs and contouring to your body.
Different needs require different heights and styles, but assessing your specific uses and abilities will help guide you to the proper selection.