These are the best envelopes for us cost wise and for being sturdy. As a law firm we do send out quite a bit of mail to other attorneys and to the courts. We rarely ever have difficulties with the envelopes during mailing no matter how far they have to go. We also use these for return mailings and they same thing there they hold up quite well even though they are handled a great deal at the post office and at the Clerk of Courts offices and attorneys not to mention to and from the clients. The one thing that I would add to this envelope is the security liner for privacy issues.
Good for our small office. We have had issues with other brands with the pull tab over the adhesive getting pulled off in the printer but not with these envelopes.