Grabbed these envelopes to use at our business. Had good experience with Staples branded items in the past so did not expect issues. Queue these guys up. Wow if there was a way to make them more cheaply they definitely pursued it. Material is so thin can easily read printed documents through it. Glue holding seams together doesn’t really so they fall apart. The “easy seal” not so much. Peels right open again. So to use these for mailing we have to tape the seams and flap shut and wrap contents in another sheet of paper costing added time and money that we were supposed to be saving by buying these.. My recommendation - save yourself some money and buy a higher priced envelope from a reputable brand like Avery.