Tilting backrest for free rocking from 90° to 120° and can be locked at any angle-Double-back structure combines a small upper backrest and a lower lumbar support-Scientific 2D headrest for optimal support to reduce head and neck fatigue-Has a 3D adjustable armrests, allowing you to find your most comfortable position-Retractable footrest allows you to freely stretch legs for better relaxation-Waterfall seat surface can adapt to your hip curves for better comfort-Upholstered in premium mesh fabr