We have two of these Alera EX4114 Ex Series Mesh Multifunction High-Back Chairs available. They're both in good shape. They're very comfortable, with a mesh back, and cushioned seat. They have tons of adjustment options:
- Up/down
- Independent seat tilt lock
- Independent back tilt lock
- Tilt tension
- Seat slide forward/backward
- Adjustable arms
- Ratcheting adjustable back
- Lumbar support