Tubo tubes are a selection of flexible tubes that can be attached to the cushions to provide greater stability and rigidity in particularly demanding cases. It helps to model more asymmetrical forms of backrest and headrest, as well as increasing the rigidity of side and head supports. Using Tubo the option exists to achieve a stable shape with a less firm cushion. The construction allows for multiple bending and shape changes. The external Velcro surface allows fastening to any Velcro surface and can be used to secure the stabilisation shorts and harness.