These envelopes are o-u-t-s-t-a-n-d-i-n-g! Not only do I not have to lick the gummy part they really do give me a warm fuzzy since I tried to see through them and couldn't! While I don't mail that many things these days - these envelopes last a while. I highly recommend these based on the price quality and ease of use. All you have to do is rip the paper strip off and the seal stays put. I don't use the regular white envelopes since they don't conceal the contents from prying eyes. I like to make sure no one can see what I'm mailing!
These envelopes are excellent. There were a few times I needed to get the contents out to change something after already having sealed the envelope and to my surprise the envelope could still be used and resealed without a problem (with maybe a tiny wrinkle or two).