Ergonomic Office Chair - Featuring reliable ergonomic support, the breathable mesh back and passive lumbar support release your body pressure both at home & office. It's easy to adjust seat height, headrest, backrest and arms to meet different needs, good for sitting long hours. Reliable Comfort - High Density Mesh Cushion for all-day comfort and support.High quality mesh resists abrasion and transformation, and the mesh back and mesh seat keep air circulation for extra comfy. Movable--Refresh your office space with this versatile choice for computer desks and workstations. Enjoy mobility over carpeted or hardwood floors with dual-wheel casters & chrome base. The whole Chair Dimensions(including the arms): 25.2"W x 21.3"D x 45.3"-52"H, the Seat Dimensions: 19.69"W x 21.26"D x 17.72"-21.65"H.Weight capacity is 220 lbs. djustable Lifting Headrest--Adjustable Lifting Headrest With Hanger help you release your neck and take care of your clothes.