The Ankle Pumper® Assist helps you move your ankle with the same heel-toe motion that occurs while walking. This motion, called dorsiflexion, is the mechanism that pumps blood back to your heart. Now you can achieve the increased blood flow that walking provides, even if you can't leave your chair. The Ankle Pumper™ Assist is a natural way to help improve lower leg circulation while reducing ankle and leg swelling. 1 Ankle Pumper Assist per package.