• Rocking backrest can be adjusted from 90° to 115°for relaxation• Adjustable lumbar support provides customized comfort for working and leisure time• Ergonomic design perfectly fit your body curve to reduce fatigue• Flexible height adjustment and 360° swivel seat suit different needs• Lifting lever & tension control (tight & loose) for easy adjustment• Made of selected materials for upgraded sitting experience• Breathable mesh to promote airflow to keep you cool during long work sessions • High elastic sponge to provide more coziness for your workday• Equipped with adjustable 2D headrest for comfortable support• 90° flip-up armrests to slip the chair under the desk to save space• Premium gas lift and stable 5-claw base for reliable structure• Universal wheels allows for effortless movement on any floor• Assembly needed