Keep your food fresh 3-5 times longer, prevent freezer burn and save both time and money as you waste less food! Just how does it work? Well, a powerful piston pump removes the air from the patented storage bags and custom containers, then seals them tight. FoodSaver bags have 3 layers of material and special channels so that all the air is suctioned out and can't get trapped in pockets. The bag's outer layer of nylon keeps air from re-entering and spoiling your food. This machine is easy to use and you're certain to find it is a great way to maximize your food's freshness as well as helping your prepare meals ahead, pack for trips and so on.