Features 1. Safe, natural long-lasting heat: odorless, disposable, single-use item, do not apply directly to the skin. 2. 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. 3. 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. 4. Package include: each value pack contains 10 individual warmers, up to 10 hours of heat. Note: keep in a cool place out of direct sunlight. 5. When to use: tailgating at events, outdoor sporting events, hunting and fishing, camping and hiking, working in the yard, jogging or taking your pet for a walk. Convenient, compact, portable. Specification Material: Plastic Color: Yellow Size: 10 x 13 cm Weight: 305 g Heating time: 10 hours Heating temperature: 55 Package Include: 10 Hand Warmer(1 Bag)