The Black Split-Back Ergonomic Office Chair (model ERG-SB-001, unbranded) features a sleek, all-black cohesive profile designed to blend seamlessly with a range of interior palettes. Its structured layout integrates a contoured split backrest, centrally mounted adjustable headrest, padded armrests, and a broad five-star base to create a balanced, professional silhouette that avoids bulky visual weight even with full ergonomic feature sets. Constructed for long-term durability and consistent comfort, the chair uses a breathable black polyester mesh backrest paired with independent dual support pads that contour to the left and right back muscles for targeted lumbar support. The seat features a molded high-density polyurethane foam core upholstered in woven black mesh fabric, set within a reinforced PA66 nylon structural frame. Armrests are fitted with soft PU padding on height-adjustable reinforced nylon support posts with secure locking mechanisms, while the glass-fiber reinforced nylon five-star base supports a chrome-plated Class 4 steel pneumatic gas lift and dual-wheel casters with PU tread and nylon hubs. All seams are stitched to a consistent, durable pitch, and the back mesh delivers robust abrasion resistance for extended daily use. Core functional features support personalized comfort for extended seated tasks: the chair enables full 360-degree horizontal swivel, 100mm of vertical seat height adjustment controlled via an under-seat lever, and a maximum 135-degree backrest recline with four-position tilt lock. A user-accessible under-seat dial adjusts tilt tension to match individual user weight, while the headrest offers 100mm of vertical height adjustment and 30 degrees of tilt to deliver customized neck support. The dual-wheel casters roll smoothly across hard floors and low-pile carpet without leaving surface marks, and the chair is rated to support a maximum recommended user weight of 150 kg. This chair is suited for a wide range of commercial and residential spaces, including open-plan office workstations for 8-hour daily desk work, compact home office studies paired with standard-dimension desks, conference and meeting rooms for sessions of varying length, executive private offices matched with 2.4m executive desks, and high-traffic coworking spaces where frequent adjustment and shared use demand durable construction. Procurement teams should note that each unit ships across two cartons, with an assembly time of 40 minutes per set. The product comes with a 3-year warranty, and bulk orders can plan for 135 sets per 20GP container at 85% space utilization for logistics planning.