Adjustable headrest and lumbar support perfectly support your head, neck, and waist-90° flip-up armrests provide arm support and save space-Comfortable mesh fabric and sponge for ultimate comfort-S-shaped backrest with ergonomic design fits your spine curve-The rocking function relieves your fatigue-The height-adjustable lever allows you to freely adjust the seat height(19"-23")-SGS gas rod for stable lifting and strong load-bearing capacity-5-claw base keeps it stable-Designed with 5 universal