there is an adhesive paper on the back.
CD plastic bags adhesive envelope
there is an adhesive paper on the back. slip paper first, there is an open on the top, it can open only once, you can find it watched or not.
Zipper Document Enclosed Reused
Shipping Label Pouch Visual Window
Packing List Enclosed Full Color
Printed Packing List Enclosed
Shipping Label Sleeves
Reusable Poly Document Pouches