The Bolongkeli Smart Furniture High-Back Black Mesh Ergonomic Office Chair, model EOCH-MESH-ADJ-001, features a sleek, professional silhouette defined by clean monochrome black finishes and purpose-built ergonomic contours. Its structured layout includes a contoured high back, cushioned seat, centrally mounted adjustable headrest, height-matching armrests, and a wide five-star base for stable weight distribution, with smooth rolling casters fitted to each base leg for unobstructed movement across workspaces. Constructed for long-term durability, the chair pairs a breathable polyester mesh backrest set on a reinforced plastic frame with a 50mm thick high-density molded foam seat upholstered in hard-wearing black fabric, rated for 50000 Martindale abrasion cycles. The curved headrest combines mesh surfacing with a padded foam core on an adjustable bracket, while armrests feature soft polyurethane pads on rigid height-adjustable support posts. The 3mm thick reinforced nylon five-star base has a matte black finish, paired with a Class 4 black powder-coated steel gas lift, dual-wheel polyurethane casters with roller bearings, and a 3mm thick steel control chassis with tilt tension adjustment. Core ergonomic functions support all-day seated comfort: the gas lift delivers 100mm of vertical seat height adjustment via a right-side lever, the backrest reclines to a 135° maximum tilt with multi-position lock controlled by an under-seat lever, and a rotating under-seat knob modulates tilt tension to match user weight. The headrest adjusts 100mm vertically and rotates 45° to align with neck contours, a curved lumbar pad moves 50mm vertically for targeted lower back support, armrests adjust 100mm vertically to cradle elbows, and 360° swivel enables easy multi-directional access to surrounding work areas. The chair supports 8 hours of daily seated work, fitting seamlessly into open plan office workstations, compact home office study spaces, conference rooms with standard neutral furniture palettes, and shared hot-desking environments that serve a wide range of user heights, particularly for computer-based task work. It pairs best with a 2.4 m executive desk for optimal fit. For procurement, note each unit ships in 2 cartons, requires 40 minutes of assembly, has a packaged gross weight of 23 kg, and supports 135 set loading in a 20GP container at 85% space utilization, with a maximum static load capacity of 150 kg.