• Thick sponge cushion and breathable fabric for ultimate comfort• 15.5"-19" adjustable seat height for customized comfort • Easy to adjust the height by lifting the height adjustment lever• 15° gentle rocking function brings optimal relaxation• Ergonomic design supports extended periods of sitting• Armless design maximizes the available space in your office area • Sturdy metal base ensures strong stability and load capacity• SGS certified gas lift provides strong support and high safety • 5 smooth rolling casters make it easy to move around• Can be used as an office chair or vanity chair