Comfortable Office Chair: The office chair with lumbar support, flip-up armrests and 3D headrest. Provides comfortable support for your head, back, hips, arms and waist. This ergonomic office chair suitable for work, leisure, study, gaming Flexible Adjustment Functions: The ergonomic desk chair backrest rock 90°-120° and adjusts the home office desk chairs height by 4, so you can adjust the tilt angle and height within this range and find your favorite position to focus on work or relaxation