GUOYOU OC-MB-BL-012 is a mid-back mesh office task chair featuring a clean, functional visual profile with blue woven mesh backrest, matching blue fabric seat cushion, fixed white armrests, and a polished chrome 5-star base. Its compact footprint fits neatly into dense workstation layouts while mntning a professional, neutral aesthetic that blends with varied interior schemes. In construction, the backrest uses tensioned blue woven mesh stretched over a rigid plastic inner frame framed by dark blue hard plastic trim, paired with a molded high-resilience polyurethane foam seat cushion upholstered in coordinated blue woven fabric. The armrests are crafted from white reinforced PP plastic with integrated flat pad surfaces. Under-seat structure includes a black powder-coated steel chassis with Class 3 gas lift cylinder, a chrome-plated steel 5-star support base, and black twin-wheel nylon casters with steel axle pins. Seat internal support uses bent plywood, and the tilt mechanism plate is made of cold-rolled steel. For practical function, the chair offers pneumatic seat height adjustment via a left-side lever to accommodate different desk heights and user statures, full 360-degree swivel for multi-directional access, and synchro-style backrest tilt with lockable upright position for focused work. Fixed T-shaped armrests provide stable forearm support during typing, while the five twin-wheel casters enable smooth mobility across hard floors and low-pile carpets. The tensioned mesh back delivers passive lumbar and torso support with continuous r circulation to reduce heat buildup during extended sitting. This model fits a wide range of spaces including open-plan office workstations for dly 8-hour use, home office setups paired with standard height desks, meeting and conference rooms for collaborative sessions, staff training and seminar rooms requiring flexible reconfiguration, and small business or startup workspaces seeking cost-effective consistent seating. For procurement planning, each chair ships in one flat-pack carton and requires single-person assembly using basic hand tools. The chair supports a recommended maximum user weight of 120 kg, with seat foam formulated for regular dly office use. Casters deliver reliable rolling performance on hard office flooring, and the unified color and design support cohesive furnishing across large workstation deployments.