3M(TM) Non Printed Perforated Packing List Envelope FED1 is a top load, clear polyethylene, non-printed, envelope with perforated face with easy opening offering a strong rubber resin adhesive. 3M(TM) Non Printed Perforated Packing List Envelope FED1 offers an easy to remove liner, exposing a high tack adhesive that holds packing slips, invoices, cards and other shipping documents securely to packages. Envelope easily loads documents from back.