Features a breathable mesh back and mesh fabric seat for maximum support and comfort Ergonomic mesh back supports the natural curve of your spine, reducing strain during extended use Multifunction control independently adjusts the seat and back angles using two levers, offering infinite locking positions within a fixed range Adjustable arms in both height and width provide personalized support, reducing strain on your shoulders and wrists Seat height is easily adjustable from 17-inch to 21-inch for your preference 360-degree swivel and tilt functionality offers flexible movement with a central pivot point Five-star nylon base with durable, smooth-rolling casters allows for easy movement Meets CA117 fire-retardant standards for safety and reliability Supports up to 275lb. to accommodate a wide range of user