The gravity-defying PAINCAKES™ are a patented cold therapy device designed to adhere directly to your skin without actually touching it. Using proprietary Stick and Stay® technology, PAINCAKES™ hovers just above the epidermis, sending waves of cooling relief to post work-out inflammation, aches, and pains. Designed and extensively tested by athletes, PAINCAKES™ is focused relief. Stick it exactly where you need it, and it stays. No hands, straps, tape, adhesives, or any other hard-to-use contraption that can cut off circulation or irritate skin. They're reusable, and they easily conform to knees, ankles, necks, shoulders, glutes, back, elbows, or anywhere you need relief. 5 inches in diameter and fast to freeze, attach one over a sore area for just ten minutes and feel immediate relief, with no extra steps.