Ergonomic computer office chair combines a high back with built-in headrest and a waterfall seat to support your spine and help reduce leg pressure during long work sessions. The upholstered seat uses linen fabric over sponge padding for a skin-friendly, cushioned surface, while 90° flip-up, soft-padded armrests let you move closer to your desk or slide the chair underneath when not in use. A rocking mechanism with a tension control handle lets you add gentle movement for fatigue relief, and a height adjustment lever provides a 19-23-in seat height range to match different desks. The 27.5 x 27.5 x 45 in overall size with a 20 x 18.5 in seat offers a supportive sitting area, and the metal 5-claw base with smooth-rolling casters and a gas lift supports up to 275 lbs for stable mobility.