Sturdy 5-point metal base provides excellent stability and support. SGS-certified gas cylinder ensures safe and reliable height adjustment. 360° smooth universal wheels allow easy movement and flexibility. 102°-122° rocking backrest function promotes relaxation and reduces back strain. Premium faux leather offers a stylish look and easy cleaning. Elastic sponge filling offers long-lasting comfort and cushioning. Artistic wood-like surface adds a touch of elegance to your workspace. Wide backrest supports your entire back for better posture. Curved armrest reduces pressure on shoulders and arms. Comfortable headrest supports your neck and prevents stiffness. Body-hugging seat cushion enhances comfort during long sitting sessions. Provide the ergonomic support for the head back lumbar hip and leg. Tighten and loose the control knob to adjust the recline tension of the backrest. Lift up and down lever to smoothly control seat height adjustment. Enable multifunctional use including the working studying and resting. Assembly required. WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. See www.P65Warnings.ca.gov.