This ergonomic office chair offers a certified safe-to-use gas lift, adjustable height to accommodate users of different heights (approximately 155-185cm). It features a rocking motion tilt with a reclining function between 90-105°, allowing for relaxation during work. The chair includes flexible armrests that can be flipped up 90° to tuck the chair under a desk for space-saving. The seat is designed with high-density thick foam for comfort during long hours, providing good elasticity and resistance to deformation. Its sturdy base is equipped with thickened nylon smooth-rolling casters that swivel 360° and glide silently, promoting stability and mobility without scratching floors. The chair contours to the body, offering support for the back and neck. Assembly is straightforward with a detailed user manual and all necessary parts included, typically taking about 15 minutes for one person.