I purchased these for our non profit. They are a great product for the price. We used them for a return address during our membership drive. They feed through a printer easily. If you are looking for a good envelope them this is one that will meet your needs.
I strongly prefer gummed #10 business envelopes for the mailings I handle. It is very easy to tuck flaps for mailings not needing closure and as easy to seal with sponge or wet sealer for secure mailings. Give me Gummed # 10's any day!!
These are good quality but I went to Staples to buy a box of Secure Print version which the store didn’t have in stock so I bought the plain version. Thus the 4 stars. I recommend these for folks who are satisfied with plain (no security print on inner surfaces) envelopes.