Task chair with a mid-back features pneumatic, seat-height adjustment to allow a variety of users to sit comfortably at their desks. 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. The Task chair also includes a 360-degree swivel, tilt tension, tilt lock, adjustable armrest, and more.