This fireproof bag is made of fireproof cloth, safe and environmental Adopted flame retardant material, excellet fire resistance and heat resistance, safe and not hurt your hands This fire resistant pouch is also great for storing lithium batteries,a very safe way to and store all kinds of battery like, lithium battery, bromine hydrogen battery Provide small size and large size, two kinds of size to fit for different people's need,and fire resistant pouch is lightweight and portable, you can use it anytime and anywhere Explosion proof safe bag can reduce the loss caused by combustion and explosion. Especially when accidental explosion happens during charging, effecitively isolate the battery from the air and extinguish the fire We are devoted to providing good products and good service for every customer. If you have any questions,please don't hesitate to contact us for a solution, Weight: 0.21605301676 pounds