Product Dimensions: 9 inch USED AS A HOT PACK Simply add warm water (not exceeding 131 (55 )) and you have your hot pack ready to go. Heat therapy helps to relax and loosen tissues, stimulating blood flow. Heat therapy can greatly improve symptoms in conditions such as arthritis, headaches / migraines, fibromyalgia, menstrual pain / cramps, spasms, bursitis and stiff necks / backs. Our pack retains for long periods allowing for fantastic symptom relief. USED AS A COLD PACK Simply add ice and a little cold water for your perfect ice bag. Through restricting blood flow, the icepack decreases swelling, reduces muscle spasms and importantly reduces pain. Ice therapy can be used for chronic conditions such as arthritis, migraines and dermatitis as well as acute injuries such as sprains, strains and even for muscle recovery following a workout. A Must-have Product - Keeps a handy ice bag in your work desk, car and home for grab-and-go comfort from pain. Whether you are experiencing the weekend hangover, headache or aching and soreness from a recent visit to your chiropractor, get the soothing relief from hot or cold therapy right away.