Our office chairs are designed with professional ergonomics to provide comfort during prolonged sitting. The chair features a divided backrest to alleviate lower back pressure, and the elastic adaptive lumbar support effectively prevents lumbar suspension, muscle strain, and lumbar spine injury. The reclining chair can be easily adjusted using a single lever - lift for seat height adjustment and pull out for reclining. It offers three tilt angles for your preference. The armrests are also adjustable within a 3" height range. The widened headrest conforms to the curve of the human neck, providing up and down adjustment and a 60-degree rotation.