This high-back ergonomic mesh office chair is engineered with contoured backrest matching human body curves, equipped with vertically adjustable lumbar cushion and multi-angle rotatable headrest to relieve waist, back and neck pressure for long-hour sitting. It features 90° flip-up armrests for space-saving storage under desks, paired with elastic sponge seat cushion and breathable mesh back to avoid stuffiness during extended use. The chair supports 90° to 120° recline rocking mode for casual relaxation, built with sturdy nylon and metal frame holding up to 350 lbs. Complete assembly hardware and clear guides enable full installation within 15 minutes, suitable for offices, study rooms, bedrooms and gaming spaces.