Patented Auto-Following Backrest NEWTRAL MagicH-BPro Ergonomic Chair automatically adjusts to your back movements and offers you constant support, also promoting a natural S-curve for your spine when locked. Studies indicate that proper lumbar support reduces lumbar disc pressure by up to 50%. Renowned Experts Endorsement This chair is endorsed by experts such as Iris Sokol, an American ergonomist; Dr. Kevin Morgan, a prominent chiropractor; and Matt Penney PT, DPT, ATC from Advanced Sports Therapy. It encourages a relaxed, neutral back position, effectively mitigating and preventing injuries caused by improper postures, setting it apart from other chairs. Ultimate Comfort for WFH & Leisure The Auto-Following Headrest automatically adjusts to your head and neck movements, providing continuous and optimal support. It features a foldable footrest and is lockable across 4 key positions ranging from 96°-136° tilt, keeping you at ease continuously. This is really an ultimate WFH and leisure system. Tailored Ergonomic Chair NEWTRAL designs ergonomic chairs to meet different needs. With 4D armrests, a divided-stress-zone high-density sponge cushion, and an adjustable seat for height and depth, our chair ensures personalized comfort for long-time sitting. Suitable for people 5'3" to 6'3" tall. Guaranteed Quality It's equipped with a Class 4 SGS-certified gas lift and boasts BIFMA and EN1335 certifications, ensuring its durability and reliability. Clear instructions and necessary tools make assembly effortless for everyone. Specification： General Brand: NEWTRAL Type: Ergonomic Chair Model: MagicH-BPro Color: Grey Specification Backrest: Mesh, Patented Auto-following Mechanism With Auto-following Mechanism: Yes Footrest: Yes Lower Back Support Strength Adjustment: Yes Lower Back Support 4 Positions to Lock: Yes Rebound Sponge Cushion Seat: Yes Divided Stress Zone Cushion Seat: Yes Head Rest Adjustment: 15CM Height 51 Degree Angle Recline Adjustment: 96°/116°/126°/136° Back Rest Independent Height Adjustment: 6CM Seat Depth Adjustment: 37.5CM to 47.5CM Seat Cover Fabric: Water Proof, Anti-Static Seat Width: 51.8CM Seat Height: 44CM to 52.5CM Arm Rest Adjustment: 4D extended; 5CM Back Forward, 2CM Inside Outside, 20 Degree Turning Around, 7CM Up Down Base: Detachable Steel Base with Five-star Wheels (Aluminum, 4+1) Chair Overall Height (in): 41.3" to 52.4" Max Weight: 300 LBS Weight & Size Product Weight: 24.5kg Package Weight: 37kg Package Size(L x W x H): 68*41*53cm Package Contents 2 x 4D Armrest 1 x Auto-Following 1 x Backrest 1 x Footrest 1 x Headrest 1 x Divided-Stress-Zone Cushion 1 x User Manual