Ergonomic Office Chair, Rustory Mesh Office Chair with Sliding Seat, 3D Armrest High Back Desk Chair with Lumbar Support Adjustable Backrest and Headrest

【Superb Lumbar Support & Large 3D Armrests】Amazing backrest that can swing left and right, and 3 gears up/down adjustments. Superb lumbar support and Large 3D Armrests, adjustable seat slider, fabric mesh for seat and back, it is designed and shaped to best-fit human needs. 【Adjustable Mesh Seat Slider】Equipped with excellent adjustable system which includes adjustable seat depth, headrest, backrest, 3D armrest, seat height and 3 levels tilt-lock mechanism. (The seat depth adjustment changes the depth(4cm) of the seat to accommodate the length of your thighs.) 【Strong Construction】Spine bionic backrest to help release pressure from the spine. Excellent build quality with good balance of metal and nylon construction, which is ideal for adults up to 300 lb. High load bearing R350 aluminium alloy base, high strength alloy gas lift, mute nylon wheels is safe for most floors. 【Easy to Install】◆Provide the detailed instruction to help you quick and hassle-free to install the office chai