Quick identification: biodegradable document enclosed envelopes have a clear wallet which means that you can identify your package contents without having to open it. Durable adhesive backing: adheres quickly to all cartons, boxes & stretch film ensuring shipping documents & packages are never separated. Oxo-biodegradable pouch: the film will begin to degrade after 2-3 months is left in direct sunlight & will last 6 months if stored in a cool, dark environment. Environmentally conscious: these document enclosed envelopes are made using water based adhesive, solvent free inks & release paper from managed forests