Secure your packing list or inventory of what's inside large boxes with these self-adhesive polypropylene envelopes. On the top, it reads "Packing List Enclosed." Peel the wrap from the bottom to apply to a package for more convenient delivery. Receivers won't have to search through the box to find their record.Secure your packing list or inventory of what's inside large boxes with these self-adhesive polypropylene envelopes. On the top, it reads "Packing List Enclosed." Peel the wrap from the bottom to apply to a package for more convenient delivery. Receivers won't have to search through the box to find their record.