Ergonomic High Back Desk Chair - Executive Home Office ChairErgonomic ChairThe office chair is ergonomic design, according to the four curvature degrees of the human spine, the natural curve and posture of the human body with "S" shaped chair back design to present, delay the excessive fatigue of the spine, provide you with a comfortable office experience, relieve the fatigue caused by sitting for a long time. Multi Function AdjustmentThis high back mesh office chair has a height adjustment range of 3. 39