The ERM-OC660-HB unbranded high-back ergonomic mesh office chair balances professional understated styling with structured ergonomic support for daily seated use. Visually, it features a streamlined open-profile design defined by its taut mesh backrest, curved contoured seat, and matching curved mesh headrest, mounted to a smooth five-star base. Its dimensions of 660 x 680 x 1220 mm create a compact footprint that integrates cleanly with a range of workspace layouts, with a 620 mm tall backrest, integrated mid-back lumbar contour, and headrest that extends 130 mm above the backrest for aligned neck support. The chair’s construction prioritizes long-term durability and comfort across all contact and structural points. The backrest uses high-elastic breathable polyester mesh stretched over a glass-fiber reinforced polyamide frame, paired with a high-density molded polyurethane foam seat cushion that is 80 mm thick with a density of 50 kg/m³ and 60% rebound rate to reduce pressure points during extended use. Armrests feature soft polyurethane padded tops, while the reinforced nylon composite five-star base supports a chrome-plated Class 3 steel gas lift, 2.5mm thick stamped steel butterfly tilt chassis, and 65mm polyurethane casters built with nylon hubs. The mesh fabric meets a 50000 Martindale abrasion resistance rating, and the gas lift carries a 150 kg static load rating, with a recommended maximum user weight of 136 kg. Core functional features are designed to support personalized positioning for a wide range of users. A lever controls 100 mm of vertical seat height adjustment via the Class 3 gas lift, supporting a maximum seat height of 530 mm. Armrests offer 85 mm of lockable vertical adjustment, the headrest adjusts 130 mm vertically for tailored neck support, and the tilt mechanism enables 125 degrees of backrest recline with multi-position locking. The chair supports 360-degree full rotation, and its PU casters roll smoothly on hard floors and low-pile carpet. The integrated contoured lumbar zone built into the mid-back mesh frame delivers consistent lower back support without separate adjustment components. This chair is suited for a variety of public and private work environments. It works well for corporate open office workstations, supporting 8-hour daily seated work with targeted lumbar and neck support. Its compact footprint fits standard home office desk setups, with adjustable settings to accommodate multi-user households, and its polished, professional appearance suits conference meeting rooms where swivel and tilt functions support natural collaboration. The durable build stands up to the frequent user turnover in coworking shared spaces, adjusting easily to diverse body types, and the breathable mesh back prevents heat buildup during extended sessions in study and home computer work areas. It is ideally paired with a 2.4 m executive desk for proportional visual alignment. For procurement planning, each unit ships in two cartons with a total packaged gross weight of 23 kg and total carton volume of 0.26 m³. On-site assembly takes an 40 minutes per set, and 135 sets can be loaded in a 20GP container at 85% space utilization, supporting efficient bulk ordering for commercial fit-outs.