The Avon protection CBRN escape hood is a one time use "gas mask" that protects the wearer from almost any hazard for at least 15 minutes. The escape hood is designed to do exactly what it sounds like it is supposed to do, allow you and your family to escape a chemical, biological, radiological, or nuclear threat. Code "PREPMEDIC10" for 10% off your order (not affiliate link) Buy here: https://shop.avon-protection.com/collections/escape-hoods/products/avon-protection-nh15-crbn-emergency-escape-hood?variant=44314593460461