Valro ProTX fireproof bags are made for the safe transport of your lithium batteries. The ProTX is made of braided fiberglass and has a double-sided refractory coating. The material used is IATA approved and can withstand temperatures up to 850 degrees Celsius. The bag has a double closure with both a push button and Velcro and two internal flaps prevent the fire from spreading. Valro ProTX Fireproof bags provides extra safety in, for example, the case of unattended (fast) charging of lithium batteries and transport of loose batteries in aircraft. Valro bags also provides extra safety and protection for long-term storage.