StockPKG non-channeled vacuum bags are made of 9-layer poly nylon and provide excellent moisture and oxygen transmission rates. These vacuum food bags work great with any of our sealers and are a perfect fit for all types of food packaging. Our vacuum sealer bags are widely used by home users, large scale food packers, hunters, fishers, and more! Bags are FDA and USDA approved for direct food contact. These 3mil vacuum sealing bags are made from nylon with EVA as an additive, which draws the package tight around the product. If your sealer requires the use of "channel-lock", "mesh", or "quilted" vacuum pouches, these bags will not work.