Features: 1. **Long-lasting Warmth**: Enjoy up to 18 hours of soothing heat with our hand warmer patches, perfect for keeping your hands cozy during cold days. Ideal for both babies and adults! 2. **Safe & Effective Materials**: Made with iron powder, wood powder, and activated carbon, our hand warmers provide fast heating without any powder leakage or mess. 3. **Easy to Use**: Simply wash your hands, unwrap the warmer, and let it naturally heat up in your palm. Experience gradual warmth that lasts! 4. **Portable & Convenient**: Compact size fits easily in bags and pockets, making it the perfect companion for outdoor activities, travel, or daily commutes. 5. **Relief for Cold Sensitivity**: Designed for those who feel cold easily or experience abdominal discomfort, our hand warmers offer comforting heat wherever you go. Our hand warmer kit contains iron powder, wood powder and activated carbon. It can be good material, fast heating, no powder leakage, no iron powder. The way to use it is simple: 1. First, wash your hands with disinfectant and warm water. 2. Unwrap the hand warmer and place it in your hand to let it warm up naturally. 3. Cover your hand with the hand warmer and your hand will slowly warm up for a long time. Suitable for people who are afraid of cold/abdominal discomfort. Mini size, fits in bags and pockets.