... with nylon inner urea and water 5. Function:5.1. For sports and leisure activities&driving;working under the burning sun ... ;5.2. For relieving fevers, headaches, toothaches and sprains.5.3. to reduce body temperature, relieve pain and swelling6. How to use:6.1. Pouch ... relieve pain and swelling.7.2.More convenient and useful for driving, traveling, fishing, mountaineering and camping.7.3. Disposable ...