VacMaster 30749 Re-Therm Chamber Pouches, 10-Inch by 15-Inch 3-Mil, 1000 Per Box Can stand up to (100 C) 212 F for 30 minutes. Can be frozen, refrigerated, microwaved or used as boilable soup bags. Constructed of a 3-mil nylon/poly material with a high puncture and abrasion resistance. Keeps food fresh up to five times longer. BPA-free and FDA approved.