VacMaster 50717 3-Mil Zipper Vacuum Chamber Pouches, 6 by 10-Inch, 1000 Per Box Features a re-closeable zipper for more flexible use. Keeps food fresh up to 5 times longer; eliminates freezer burn and dehydration. Pouches can be frozen, refrigerated, microwaved, or boiled. Nylon/poly 3-mil material with a high puncture and abrasion resistance. BPA-free and FDA approved; compatible with chamber vacuum sealers.