The Yiankang Mid-Back Cognac Leather Executive Swivel Office Chair (model OFCH-MB-CNL-001) presents a refined, professional silhouette anchored by a polished brushed silver five-star base and matching die-cast aluminum armrest brackets. Its top-grain cognac brown leather upholstery features clean edge stitching across both the seat and contoured mid-back, paired with a matte light gray rigid composite outer shell for the backrest and seat underframe, and fixed wooden armrest pads finished to match the leather. The chair’s aligned seat and back proportions create a streamlined, formal profile suited to premium work environments. Construction balances durability and comfort, with a powder-coated steel synchronized tilt mechanism, Class 3 chrome-plated steel gas lift, and high-resilience polyurethane foam cores: the seat uses denser foam with a 90mm finished cushion thickness and curved waterfall front edge, while the backrest uses medium-firm contoured foam with a dedicated lumbar support zone. Hard nylon dual-wheel casters attach to the reinforced aluminum base for stable movement. Functional features support full workday use, including pneumatic seat height adjustment to align with standard desk heights, a lockable synchronized tilt with customizable tension control, full 360-degree swivel rotation, and omnidirectional caster mobility suitable for hard floors and low-pile carpet. The fixed armrests sit at a height aligned for relaxed forearm support during typing and meetings, while the waterfall seat edge reduces thigh pressure, and the contoured mid-back delivers targeted support from the lumbar region to the mid-shoulder to reduce slouching and fatigue. The chair is well suited for executive private offices paired with high-end wood desks, formal corporate boardrooms and client meeting spaces, premium home office setups, and senior management workstations in open-plan offices, where its mobility supports easy cross-team collaboration. For procurement, teams should note the chair ships in knock-down configuration, with on-site assembly required. Final material grades for leather, composite shells, and armrest pads require bill of materials confirmation prior to bulk order. Optional soft-tread casters are available for high-pile carpet installations, and the chair is rated to support up to 8 hours of daily commercial use, with container loading s available for large-scale project planning.