Mid-Back Mesh Swivel Ergonomic Task Office Chair with Gray Frame and Flip-Up ArmsIf you've never owned a back chair, then you're in for a real treat with this ergonomic task chair. The ventilated design allows air to circulate to your back, keeping you cool and comfortable enabling you to concentrate on the task at hand and increasing your productivity. This chair has important features such as a flexible back with lumbar support, pneumatic seat height adjustment and the ability to recline rock back and forth with the tilt lock