SOOTHING LOW-PRESSURE AIR MASSAGE HELPS YOU FEEL BETTER IN MINUTES! Designed especially for those with circulatory problems in the lower legs and feet, the gentle massage offered by the AIR MASSAGE BOOTS helps to relieve fatigue and pain associated with poor circulation. Simply slip on the vinyl boots, plug in the controller and choose your setting and zone to receive a non-invasive and comfortable compression treatment. Includes instruction booklet. Velcro adjusts fit up to a 22" calf and up to a 29" thigh.