MATERIAL: * LDPE (Low Density Polyethylene) * Sulfur free. * Latex free. * BHT free (Butylated Hydroxy Toluene). * Amide, Amine, & Silicon free.TEMPERATURE RANGE: 20 - 150 FMISCELLANEOUS: * Shipped with zippers closed. "Open" bags not available. * Can be put in freezer, but cannot be quick/flash frozen. * Not leakproof, waterproof or airtight. See Leakproof Bags * Not microwavable. * Cannot be boiled. * Not recommended for dry ice. * Not treated for printing by end-user. * MVTR (Moisture Vapor Transmission Rates) or OTR (Oxygen Transmission Rates) not available.