VacMaster 30778 4-Mil Chamber Pouches, 10-Inch by 13-Inch, 1000 Per Box Heavy-duty 4 mil thick material provides a superior pouch for optimum freshness and reliable seal Keeps food fresh up to 5 times longer; eliminates freezer burn and dehydration Pouches can be frozen, refrigerated, microwaved, boiled, or cooked sous vide Nylon/Poly construction for high puncture and abrasion resistance BPA-Free and FDA approved; compatible with chamber vacuum sealers