I have not used the new envelopes yet. The last ones I had did not have enough adhesive on them. But rather than return them I just used scotch tape. Otherwise I have no problem with them and the price is very good.
I have been using these envelopes for many years. They are now as good as they have always been. I am going on 86 years of age and for as long as I live your envelopes will be mine.