â- Rocking backrest can be adjusted from 90° to 115°for relaxationâ- Adjustable lumbar support provides customized comfort for working and leisure timeâ- Ergonomic design perfectly fit your body curve to reduce fatigueâ- Flexible height adjustment and 360° swivel seat suit different needsâ- Lifting lever & tension control (tight & loose) for easy adjustmentâ- Made of selected materials for upgraded sitting experienceâ- Breathable mesh to promote airflow to keep you cool during long wor