Ergonomic Office Chair-Essential office chair for work, upgrade your work set-up! The enlarged headrest and bionic spine backrest provide reliable scientific support to help you maintain the correct sitting posture at work and protect your spine health Adjustable Lumbar Support-Upgrade on the basis of the ordinary office chair, adding an adjustable built-in lumbar support to provide a better full back support. Operate the lumbar support knob to increase and decrease back pressure at your preferable level, customize your own comfort! 5.3" Thick Padding Cushion-The thick leather and rich padding make the cushion of this chair very soft and comfortable to sit on, even after a long day of work, it will not feel hard. Waterfall seat edge helps release pressure on the thigh, bringing better sitting experience Padded Flip-up Armrests-The executive office chair designed with flip-up armrests, can be pushed below any table or office desk. Extremely practical for stowing and im