The envelope has a thin feeling and looks on the cheap side. I have found that over 50% of the envelops has a closed or glued bottom corner that has to be forced open to fit in your mail. I will not buy them again.
We use the Staples Gummed Laser Double-Window Security-Tint Envelopes 500/Box (394062/19045). If you have concerns about mailing out confidential materials checks etc. THIS IS YOUR GO2 PRODUCT! Terry