Strong Star Base: Sturdy and stable star base is capable to hold up to 300KG. Curved backrest can perfectly line up with human body line and support your spine's natural curve. The lumbar support system resembles a pair of hands, pushing up and holding your low back. Thickened cushion to provide you with a softer and larger sitting area. Breathable Mesh Backrest: Allows better airflow, accelerating heat and moisture dissipation. Adjustble height. Seat can be adjusted for your utmost comfort.