Aluminum Foil Bag is made of high quality PET and aluminum foil, which is non-toxic & odorless, and obtains food-grade certification. That it can be used safely and securely. Resealable stand up Zip lock Bags with transparent window,easier to open and storage. Thick Barrier material can protect the food from moisture and odor, fit for long-time food preservation. Perfect for coffee beans, candy, sugar, cookies, chocolate, tea leaf, grain, nuts, dried flowers.