I bought these recently to attach to handouts in my neighborhood for renewing their dues. Some came back to me "taped" on the back. I was very embarrased. People were afraid to put checks in them. You can close the envelope and it pulls right back open. Horrible.
Love this product. The "peel and stick" feature is extremely efficent; I DISPISE licking envelope flaps to get them to stick. I have tried using the sealing "glues" with very little success; add too much and the flap will not stick don't add enough and the seal will not stick...the "peel and stick" feature eleminates this issue. I have never had an enevelope to open before the receipiant receives it. The privacy printing on the inside of the envelope is FABULOUS as well. I help my husband run his business and I have my own as well so the privacy of sending checks proposals letters etc. is great and we do not have to "waste" another piece of paper to "wrap" around mail to protect our privacy and our receipiant's privacy.
I use these all the time. They are so very easy and convenient and I don't have to lick envelopes which I really hate. These envelopes are also quite secure and you can assure they are not see-through and they are completely private. The envelopes are also the perfect size for all 8 1/2 x 11 correspondence folded in thirds. And also the perfect size for multiple pages. I'm the go-to person for things like this and my family is always grabbing them from me. So yes I would definitely recommend these envelopes for everyday and business use.