Ergonomic Lumbar Support: 5cm height adjustment for precise lower back support, relieving pressure from prolonged sitting. Zero-Pressure Cushion: 12cm thick W-shaped cushion conforms to the curves of your hips and legs, reducing pressure from long sitting periods. Flip-Up Armrests: Flip up the armrests and tuck the chair under the desk to save space. Suitable for Multiple Scenarios: Hbada J3 computer chair can be applied in different scenarios according to different needs, like office, home, gaming, study.