Stays secure through tough handling conditions. Keep packing slips, invoices, cards & other shipping documents safe & secure. This polyethylene envelope is top-printed with the message "PACKING LIST / INVOICE ENCLOSED" & comes with a high-tack rubber resin adhesive that sticks immediately upon contact. The peel-and-stick envelope is oil- & water-resistant & built to withstand the toughest handling conditions. Also great for use as an interim holder for papers to be attached to shipping container. Easy to apply, easy to use. This envelope also easily loads documents from the side. Works well in situations where the shipping orders are generated in an office area & later applied to the proper package in the shipping area. Seam Type: Weld; Flap Type: Square; Security Tinted: No; Opening: Open Side.