Shield N Seal's Clear and Black Vacuum Sealer Bags are perfect for long term storage of food and perishables. These bags are the thickest, BPA free, food grade heat seal rolls. Studies have shown that vacuum sealed food can stay fresh up to 5x longer. BPA free means that you can cook with confidence. You can sous vide your favorite recipes, knowing that our materials are food safe. They will not affect the flavor of the food, nor will they leach toxins that will harm your family. Your meal will retain its taste, aroma, & nutritional value. Clear and black plastic vacuum seal bags are perfect for any type of food stuff; meat, chicken, fish, produce, and even coffee, tea, and herbs are kept amazingly fresh when sealed in these bags. We've made our new bags stronger and thicker than ever before, making sure that they lock out moisture and air. They reduce freezer burn better than any other bag we've tested. And while it locks in flavor, it will also lock in odor. You don't have to worry about strong smells emanating from a Shield N Seal bag. Pungent food or garden odors are locked in tight, for good. These bags have a unique double seal feature. You can heat seal your bag, and then use our zipper closure to open and close your bag over and over again. The clear plastic is perfect for showcasing your recipes. You'll be able to easily find what you're looking for as you pull it out of deep storage. Clear and Black construction allows for supreme versatility. Some times people like to be able to see their food through the clear side, and other times, it is better to have your bags be light proof. To protect from light and sun, simply double bag, flipping one bag around. One side of bag has a zipper closure that is pre-sealed. The other side is fully open and can be heat sealed once the bag is filled. We recommend Shield N Seal Sealers for optimum heat seal closure, but these bags work with most heat sealing devices.