1. and compact design This pocket heater hand warmer is light and compact, making it easy to carry and perfect for outdoor activities such as camping, fishing, and hiking to ensure warmth on the go. 2. Reusable and environmentally friendly Unlike hand warmers, this hand warmer is reusable, helps reduce waste while providing long lasting warmth. Simply heat the internal carbon rod and use it repeatedly for your outdoor adventures. 3. zinc alloy construction: Made of high quality zinc alloy, this hand warmer is built to last and delivers performance in cold conditions, making it a great companion for outdoor enthusiasts and winter sports lovers. 4. Easy to use and effective To use this hand warmer, simply heat the internal carbon rod (carbon rod not included) and put it to use for warmth, providing a simple and efficient way to keep your hands warm in cold weather.