Giantex Mesh Office Chair with Swivel Casters Mid Back Mesh Chair Ergonomic Modern Computer Desk Task Chair, Black Black Appearance --- Covering with a total black mesh and black seat, this chair can perfectly ease your back pain and relieve your strain. Its seat design has an extremely comfortable mesh back that enables you to ease your mind and support your back, which is quite conducive to your health during your long work time. Adjustable Seat Height --- The adjustable seat height can meet your different demands from 14.9" to 18.8" just by pneumatic gas lift. A suitable seat height can surely maximize your working enjoyment and spark your passion which can totally improve your working efficiency. Selected Material --- With soft breathable sponge cushion and mesh back, this office chair brings you an perfectly feeling of relaxation and comfort. You can physically sank to this gorgeous chair and indulge in it with this premium user experience. Reliable Performance --- It enjoys a great population in office-use and home-use. And it is quite suitable for your workstation to engage in your work, which is also a good choice for office people to ease your tension after long work time. 360Swivel Rotation --- Equipped with 360 degree swivel rotation, you can move easily to the desired place. 5 castor wheel also guarantees you a greater stability. It is quite labor-efficient and the smooth move can fulfill you purpose of chair racing.