Designed for 8+ hours of working, studying, or gaming, the ergonomic office chair features adaptive lumbar support that flexibly adjusts to your lower back, helping reduce pressure and ease fatigue. The sturdy structure supports up to 300 lbs, and anti-slip backrest locks provide added stability.This chair includes a 2D adjustable headrest, height-adjustable seat, and a 135° lockable reclining backrest with 3 locking positions.