Tubo is a system of flexible tubes that can be attached to the cushions to provide greater stability and stiffness in particularly demanding cases. lt helps to model mare asymmetrical forms of backrest and headrest, as well as increasing the rigidity of side and head supports. Using Tubo we can achieve a stable shape with less cushion hardness. The construction allows for multiplebending and shape changes. The external Velcro surface allows fastening to any Velcro surface.