[Ergonomic Office Chair]: This ergonomic office chairs humanizes the backrest and lumbar support, bringing the back closer to the natural curve, so that the spine is free from soreness. Helps you maintain a relaxed posture during long working hours. Easier to disperse stress and relieve muscle fatigue.[Flip-up Armrests]: The upholstered armrests of the mesh office chair have the function of turning up and down. Comfortable padded armrests relieve elbow discomfort, and the desk chairs adjustable flip armrest feature allows you to retract the armrests after use and place the desk chairs with wheels under your desk for space-saving, easy storage. Suitable for office, living room, study, conference room, etc.[Multi-function]: The height of the home office chair is pneumatically adjustable, and the big and tall office chair has a tilt lock function (adjustable), 360-degree rotation, and solid universal wheels with silent rollers for smooth movement.