MATERIAL: * Virgin polyethylene * Acid free and archival safe * BHT free (Butylated Hydroxy Toluene) * Sulfur free * Amide, Amine, & Silicon free * Latex freeSPECIFICATIONS & APPROVALS: * Meets ASTM D3951MISCELLANEOUS: * Outside dimensions are listed. * Recyclable (#4) * Do not store in sub-freezing temperatures. * 3 or 4 Mil is recommended for use in a trash compactor. * Bottom seal. * Not treated for printing by end-user. * Cannot use with vacuum machine. See Vacuum Bags. * Water-resistant not waterproof. See Leakproof Bags. * Not recommended for dry ice. * Cannot be used for baking, cooking or boiling. * Not microwavable.