100% inner fireproof heat-resistant fabric, interlayer non-woven fabric with flame retardant effect, and PVC fiber outer layer, which effectively isolate air and improve the safety when charging. Charging with confidence knowing your home is safe from a li-po fire. No issues with TSA at airport security. A convenient way of safeguarding your Drone batteries when charging, transit, and storage. The battery safe bag is intended to reduce the chances of damage in the event of a lipo fire. 3-Sizes avalible: Size-Small for 1pc battery, Size-Medium for 2pcs batteries, Size-Large for 3pcs batteries. Note: battery safe bag only, pictured batteries are not included. Anbee Li-ion Battery Safe Bag for DJI NEO Drone, Fireproof LiPo Battery Safty Guard Pouch for Charge & Storage