This ergonomic office chair combines sturdy construction and customizable comfort for long-hour use. The backrest is made of 70% PP + 30% glass fiber with an ergonomic curve that supports the spine, covered with skin-friendly and non-slip nylon mesh. It features flip-up armrests built with the same durable composite material, paired with a class‑3 gas lift for safe and smooth height adjustment.The chair is equipped with a medium butterfly base with in-situ locking and an explosion-proof structure for enhanced safety, while the strong nylon star base provides excellent load capacity up to 300 lb. It rolls quietly and smoothly on 50MM black PA casters. The seat cushion uses high-density shaped foam supported by ≥12cm 10-layer curved boards for lasting comfort and resilience.Multiple color options are available for the mesh back and seat fabric, with colored wheel upgrades optional. Ideal for home and office use, this chair delivers ergonomic support, flexible movement, and a stylish customizable design.