Office Chair: 350Lbs Comfortable Black Office Chair With Tilt Lock, Ergonomic ?Ergonomics - Taking into consideration the physiological structure and movement patterns of the human body, SOMEET ergonomic office chair features a dual backrest and high-back design that mimics the curvature of the human spine. The office desk chair provides ample support, reducing pressure on the spine, neck, and lower back, consequently lowering the risk of health problems associated with poor sitting posture. ?Adjustable Height and Adaptive Back Support - The back support can adapt to various tilt angles according to your weight and strength to meet different sitting postures and postures. The height of the mesh office desk and chair can be easily adjusted using a gas lift mechanism to ensure a smooth transition for users of different heights. ?Adjustable Headrest and Armrests - The headrest of high back office chair is adjustable both in height, allowing a 3-inch range, and can rotate up to 45, preventing forward slouching and shoulder compression. The armrests of home office desk chairs can be flipped back and rotated 90, conveniently tucking away under a desk, saving space in your office or home. ?Lumbar Support and Easy Assembly - Equipped with spring-loaded lumbar support, our compute desk chair feature provides enhanced protection for your lumbar region, reducing the risk of lumbar strain. Additionally, this ergonomic chair includes tools and instructions for a straightforward assembly process, which can be completed within 30 minutes. Our customer support team is also readily available to assist with any questions. ?Breathability and Durability - The mesh office chair boasts an extra-wide seat cushion designed to accommodate various body types. Its high-density padding remains soft and resilient over prolonged use, preventing sagging and deformation, thereby reducing pressure on the hips and tailbone. The ergonomic desk chair?s skin-friendly, breathable mesh design has moisture-wicking capabilities.