2-ply, 3.0 mil thick, universal vacuum bags can be used with most leading brand vacuum sealers. Heavy-duty bags have air-removal channels for maximum freshness. Vacuum sealing extends food storage time by locking in freshness, flavor, and nutritional value. Simmer, microwave, and marinate food right in the bag. Made from FDA listed food safe materials. Use with Sportsman Advantage Vacuum Food Sealer.