Task chair with a mid-back features pneumatic, seat-height adjustment to allow a variety of users to sit comfortably at their desk. Mesh back allows air to flow freely to help keep you cool as you're seated. Upholstered fabric seat cushion provides comfortable support through years of use. Lumbar support offers ergonomic support for your lower back to help prevent strain through extended seating. Task chair also includes 360-degree swivel, tilt tension, tilt lock, adjustable armrest and more.Height-adjustable seating allows you to sit comfortably at your deskMesh back allows air to flow through to help keep you cool when seatedFabric seat cushion offers sturdy support for lasting useLumbar support helps prevent lower back strain through extended seatingAlso offers 360-degree swivel, tilt tension, tilt lock and more