SOHO Back Support is the best chair-mate Features *Dynamic twin backs provides ergonomic support. *Height of the backrests are adjustable. *Unique airing ports for ventilation *Slip covers for options. Functions: *Decompresses your spinal pressure and reduces back-pain for sitting hours. *Corrects your sitting posture to keep healthy curve. *Who uses SOHO BACK:  Driver, office people, wheelchair sitter, students, and any back-pain sufferer.   Additional Information: *Patents in German, USA, Taiwan, Japan, and China, etc. *100% made in Taiwan.