Zipper vacuum bags have a unique top that lets you re-use your bags after the initial vacuum seal. Reusable and Easy Open: All bags are reusable, include a space to label the date/contents and are compatible with most major vacuum sealer brands. Each quart bag has an easy-open tear notch and zipper to open and close multiple times after the initial vacuum seal is broken. Versatile: Each bag has a pattern design that helps hold in moisture. These bags are up to the task - and all at a price that makes sense. For Optimal Results: Use with the LEM MaxVac® heat bar sealers. Not compatible with chamber vacuum sealers.