Our original, award-winning backrest support, the ObusForme Wideback Backrest Support transforms ordinary chairs into ergonomically correct seating. Unlike ordinary "L"-shaped chairs, the "S"-shape of the Obus Forme Backrest Supports mold your spine into a more anatomically correct position, and help to enhance overall posture by supporting proper spinal alignment. The Wideback is 3" wider and 1" taller than the standard Obusforme Lowback.