MATERIAL: * LDPE (Low Density Polyethylene) * Sulfur free. * Chlorine free. * Amide, Amine, & Silicon free.TEMPERATURE: 20 - 150 FMISCELLANEOUS: * Bag and zipper are made of polyethylene. * Not leakproof, waterproof or airtight. See Leakproof Bags * Not microwavable. * Cannot be boiled. * Can be put in freezer, but cannot be "quick/flash frozen" * Not recommended for dry ice. * Not treated for printing by end-user.