Enhanced Lumbar SupportThis office chair features a large and adjustable lumbar support cushion filled with thick sponge to cradle your lower back and help you maintain a comfortable posture for long hours of work. It also has an S-shaped ergonomic backrest that aligns with your spine and reduces pressure and muscle fatigue. Space SavingThe armrests of this desk chair can be flipped up 90° to fit different needs and save space. You can slide the chair under the desk when not in use. The armrests are contoured to match your arms shape and have soft padding to protect your wrists and elbows. The computer chair can be adjusted in height by 3.74 inches and swivel 360° for convenience.