FoodSaver Heat-Seal Rolls let you create custom-sized bags to package and protect food. The vacuum seal rolls can be used on food and non-food items alike to keep things fresh and limit the space taken up. Rolls can be cut and folded to any size or length you need - simply cut a piece to your desired length, seal one end, fill and then vacuum seal. Channels in the rolls allow for complete air removal and the multi-ply construction blocks moisture and oxygen, and makes the food storage bags strong enough to simmer and microwave.