BRAND NEW ** Excellent Lumbar Support - The ergonomic office chair adopts bionic engineering curve design and unique 3D lumbar support system. It follows the BIFMA Standards and Greenguard. **Heavy-Duty Base - Equipped with heavy duty metal base, which provides a safer and quality assurance. The non-slip wheels bring you a smooth and quiet sitting experience. ** Larger Seat & Reclining System - The recline function allows you to tilt the backrest back (90° ~ 140°) with the tilt lock. It is great and comfy enough for you to work or rest in home or office chair for long hours. ** Easy to install - This ergonomic computer chair comes with comprehensive packaging, clear instruction and tools, easy to assemble (about 15 to 20 minutes)!!