PREMIUM ERGOMOMIC DESIGN: Enjoy complete body support with 4D armrests (flip up 90°, slide 1.2" forward/back, 2" height adjustment, 360° rotation) and 3D headrest (3.9" height adjustment, 90°/45° tilt) for all-day comfort in this ergonomic office chair ADJUSTABLE LUMNAR SUPPORT: Our mesh computer desk chair features dual-direction adjustable lumbar that moves 2" up/down and 1.2" forward/back to actively support your spine's natural curve, preventing back pain during long work hours SPACIOUS SEAT CUSHION: Sink into this comfy office chair's spacious 20.5" x 20.9" seat with 3.9" premium high-density foam that molds to your body while providing firm support, featuring advanced pressure dispersion technology for all-day comfort MULTI-ANGLE RECLINING: This high back office chair offers smooth 90°-135° reclining range with 3 convenient locking positions (90°, 115°, 135°) plus a practical rear clothes hook to keep your essentials organized and wit