Grabber warmers offer superior, all-natural, portable heat and are standard equipment for anyone who enjoys outdoor activities when it's cold outside. Warmers are air-activated, no shaking or kneading required; just open the package and allow a few minutes to start the process. Grabber Warmers are dry, clean, odorless, non-toxic, non-flammable and designed for one-time, disposable use. The body warmers are for minor aches and pains, as well as extended everyday warmth during outdoor sporting activities. Adhere to inner layer of clothing to enjoy over 12 hours of heat.