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 & more.