Our vacuum sealer rolls are constructed of commercial grade 2 ply material and 3.5 Mil thickness. These vacuum sealer rolls work with the Pro 2300 by Weston and most vacuum sealers including Food Saver brand. Bags are reusable and dishwasher and microwave safe. You may also boil food right in the bag! Hunters and fisherman can easily eliminate freezer burn on their harvest from the great outdoors. Many other household uses. Compare to supermarket prices and it is like buying 2 and getting one FREE!