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The Aeris Swopper active motion office stool unveils a transformative sitting experience by combining patented motion technology, German-engineered precision, and a playful design. Bounce up & down. Shift side-to-side. Rock back & forth. Swivel 360 degrees. This opportunity to move while you sit is as engaging and mentally stimulating as it is good for you. The Swopper motion strengthens the back, promotes an upright sitting posture, increases concentration, and makes you feel fitter and happier.