MULTIPURPOSE WARMERS – Single use air-activated heat packs that provide everyday warmth and are ideal for keeping your body warm when the temperature gets cold; Theyre available in several styles designed for your hands, feet, and body. TO ACTIVATE – Remove warmer from outer package, shake to activate; Warmer heats up in 15-30 minutes; If heat decreases, expose warmer to air and shake; After use, dispose with regular garbage; Ingredients will not harm the environment