This portable leg massager improves blood circulation for those who must sit for extended periods of time–office work or transoceanic flights–by simulating the expansion and contraction of the calf muscles. The massager provides the same type of pressure as hospital compression boots by helping to counteract the sedentary conditions that can contribute to deep vein thrombosis, a serious blood clot condition. The massager wraps comfortably around a calf (or foot) and when activated, the air bladder fills intermittently, compressing muscles which improves circulation.