Durable fabric: Made from polyester mesh fabric that is colorfast, strong, abrasion resistant, mildew resistant, chemical resistant, heat resistant, and UV resistant with high breathability and long lifespan. - Adjustable headrest: Made from PA+fiber, the headrest can be raised, lowered, and flipped upside down to properly support the neck and relieve brain fatigue. - Supportive backrest: Made of sturdy PA+ fiber and PE+ polyester mesh, it is designed with a sleek backrest with Double S for comfort and support - Customizable lumbar support: Made from flexible PP+fiber material that can be adjusted forward and back for personalized comfort. - Maneuverable base: Features a cold-rolled mechanical spring system, multi-functional steel mechanism that can adjust the height and recline with a locking function, and smooth-rolling PU casters that are gentle on floors.