Grey Office Chair, Rolling Swivel Chair With Lumbar Support, Height-Adjustable ?Ergonomic Backrest?This computer chair has an ergonomic backrest, which can give you enough support for your back, whether you are working or taking a nap, this ergonomic office chair can bring you a relaxing experience. ?Desk Chair with Flip-up Arms?The Adjustable armrests can move up and down and the comfortable armrests can relieve the discomfort of the elbow area. After use, you can retract the arms and put the ergonomic office chair under the desk to save space. ?Comfortable office Chair?The office chair using a high-density sponge cushion will fit into your sitting position for a long time. The highly breathable mesh back makes your back feel comfortable. ?Multi-Function?The metal base of this home office chair is very sturdy and can hold up to 250lbs. It also features 360-degree rotation. The desk chair has a 120 tilt tension, pneumatic height adjustable from 17.9 to 21.6inch, and matches different stature. ?Easy Installation?This mesh office chair is very easy to install, we have provided detailed instructions and installation videos.