Mylar is a special kind of polyester film that can be utilized for a variety of applications, one of which being the packaging of food. It is a thin, flexible material that is commonly used as a barrier to keep moisture and oxygen from reaching the food. Its primary function is to protect food from going bad. There are many advantages to using Mylar bags for food storage. They can withstand a lot of wear and tear without tearing or letting in any air, light, or moisture. Wallaby online store is a great place to purchase a wide variety of food storage items.