Dry-Packs 10 Mylar Bags 20"x30" 5 Gallon Size 4.5 Mil for Long Term Emergency Food Storage Supply Strong and durable Mylar bag, commonly used for food storage of dehydrated foods like grains, beans, seeds, etc. Bag is heat or vacuum sealable for long term storage of product These bags reflect light, provide a moisture and oxygen barrier and they are puncture and tear resistant 5-Gallon 10 Pack 4.5 mil Thickness, a strong and durable bag