The High-Back Ergonomic Mesh Office Chair with Adjustable Headrest and 3D Armrests, model EOCH-MESH-700HB, is an unbranded seating solution built for consistent, supportive use across professional and personal work environments. Its sleek, streamlined silhouette features a tall, contoured backrest paired with a structured five-star caster base, creating a balanced visual profile that fits both modern and traditional workspace aesthetics without appearing overly bulky. Constructed for long-term durability, the chair combines a steel-reinforced internal structure with a glass-fiber reinforced nylon back frame and five-star base, plus a 12mm thick E1-grade bent plywood seat support for stable weight distribution. The backrest is upholstered in high-elastic breathable nylon mesh, while the seat pairs breathable mesh with a high-resilience PU foam cushion. Armrests feature soft PU padded surfaces on nylon support brackets, and the mesh-padded headrest is mounted on an adjustable bracket. A chrome-plated steel Class 3 gas lift and 60mm silent PA+PVC universal dual-wheel casters complete the core build. The chair delivers a full suite of adjustable features to support varied postures: pneumatic seat height adjustment operates over a 100mm stroke, the headrest offers 155mm of vertical travel plus angle tilt, and 3D armrests move across 75mm of vertical height as well as width and depth positions. The synchro-tilt backrest locks in three positions up to 135 degrees, with 360-degree smooth swivel, a contoured central lumbar support with 40mm of height adjustment, and casters that roll smoothly on hard floors and low-pile carpet. It supports a recommended maximum user load of 136kg. This chair is suited for corporate office workstations for 8+ hours of daily seated work for administrative and professional staff, compact home office spaces, medium-length conference and meeting room use, executive offices where high-back neck and upper back support is preferred, shared co-working spaces where adjustable features accommodate diverse user sizes, and IT or design workstations that support frequent postural shifts during long creative or technical sessions. For procurement, note that each unit ships in two cartons, requires 40 minutes of assembly per set, and has a packaged gross weight of 23kg, making it straightforward to schedule delivery and installation for both single home office setups and bulk workplace rollouts.