The Flo-tech Back Support Range The Invacare Flo-tech Back Support range has been designed to provide added stability to a wheelchair or standard armchair and it can be used in conjunction with any Flo-tech cushion. The Flo-tech Back Support range provides excellent comfort and improved user positioning, which in turn helps to improve or maintain independence whilst in the seated position in a wheelchair or armchair. The unique supportive design offers protection from pressure ulcer formation and spinal deformities which can cause severe pain.