JONPONY Big and Tall Office Chair 400LBS, Office Computer Desk Chair, Task Chair, Comfort Desk Chair with Comfortable Lumbar and Support Flip up Arms, BlackProduct details JONPONY is formed to streamline home and office decor by providing ergonomically sound chairs that put your comfort at the forefront. Ergonomic features an all elastic premium mesh back and a high density sponge seat making the mesh office chair a good choice for all day comfortable office seating. The unique mesh design is skin friendly and breathable, which keeps you cool all day. New Ergonomic Office Chair Adjustable Lumbar Support