I use windowed envelopes to avoid having to print envelopes or labels. But in humid weather the sealing glue becomes moist and seals the envelopes before use. Of 500 in the box I lost about 200. Nevertheless I'm back for another box because self-sealing envelopes with a peel off strip are just too expensive.
I purchased these envelopes to run through the Inkjet printer to afix my logo. Woks fine looks good the only problem is the printer doesn't want more than 5 at a time. No problem since I don't use that many.
These envelopes are economical. Perfect for check stuffing. The glue adheres well unlike some envelopes which need to be additionally glued or taped. Wish they were less expensive but economical compared to the "peel and stick" kind.