Independent curved surface with auto-elastic lumbar support, relieves lumbar pressure; 10-zone independent support, the smooth forward-tilt curvature reduces leg pressure; reduces vertebral and shoulder pressure with a reclining range of 90°–130°; the 5-level height-adjustable backrest caters to users of different heights for both work; 5D/PU adjustable armrests; aluminum alloy 3-stage foldable PU footrest with step-style storage design for effortless use, extends up to 42cm forward from the seat.