The Torvol LiPo Safe Bag is a case for storing, charging, and transporting batteries, offering a higher level of safety than standard fireproof cases. The case is made of high-quality fireproof fabric and a polyester shell. You can safely store up to 15 batteries in the case. For convenient carrying, the case has a handle. The case is designed to fit perfectly into the Torvol Pitstop and Pitstop Pro backpacks.