Safety first, RC hobbyists! If you charge or store lithium polymer (LiPo) batteries, this guard bag is a smart investment. It's a fireproof pouch designed to contain any potential battery fires, sparks, or swelling that can happen during charging or storage. The bag is made from a combination of metal and plastic materials that resist high temperatures. It measures about 18 by 23 cm (roughly 7.1 by 9.1 inches) and has a thickness of 0.6 cm, so it can fit most common RC car, drone, or airplane batteries. It's lightweight (80g) and has a simple, portable design – you can easily take it to the field or keep it in your workshop. To use, just place your LiPo battery inside the bag while charging or when not in use. The bag helps prevent accidents from spreading and protects your surroundings. It's not a substitute for proper charging practices, but it's an essential extra layer of safety. The bag is also handy for organizing and transporting batteries safely. Every LiPo user should have one of these. It's a small price to pay for peace of mind. Keep your hobby fun and safe with this practical safety accessory.