• 21.5”-29.5” adjustable seat height fits people of different heights• The armrests can be adjusted within 3.5” through the adjustment buttons• 8”-15” height-adjustable footrest ring to support your legs• Rotate the knob to loose or lock the footrest ring• Ergonomic S-shaped backrest and lumbar support for fatigue relief• Dense mesh fabric for great breathability• High density sponge for ultimate comfort• Dirt-resistant PU leather for easy cleaning• Strong 5-claw base for high stability• Easy to move with 5 rolling wheels• Assembly needed