【Ergonomic Design】Ergonomically designed backrest of the leather office chair perfectly fits the curve of human back to give full support of your back and lumbar, relax the waist and back. The thickened non-slip comfort pad relaxes the hips, and bear the pressure of sitting for a long time. 【Multifunction Adjustable】This leather ergonomic chair features an advanced mechanism that not only adjusts the back angle and the tilt but also locks the position so you don’t have to re-adjust each time you sit down. The rear Angle and tilt lock system under the seat can lock any Angle you need. 360° Free swivel, smooth-rolling casters for easily moving to anywhere you want to go with ease and no effort.