Create a good oxygen barrier to extend the shelf life of food products with the LEM MaxVac Pro Mylar Bags. Mylar is waterproof, which prevents moisture from getting into the packaging, which could cause mold and bacteria growth.FeaturesProtect against light, moisture, and insects Mylar is the preferred storage option because it's food-grade safe and perfect for preserving dry and low-fat foods like flour, rice, and beansFlat only works in Chamber Sealers but Textured works in all MaxVac Sealers