The brown kraft clasp envelopes are very good for me because I like to send friend coupons or things I know they are looking for. I also got large #10 brown envelopes and they are also helpful when the regular envelope isn't large enough!!!
Our organization used the envelopes for an event. Perfect size. We used them last years. The envelopes were great for the kids to gather the monies and return to the team captions. The envelopes held the fliers about our event we place a tag for each envelope so the team member could write amounts and who the funds were from. A total line column on the bottom of the tag was added.
I have used this product for over twenty years. I use it both personally and for my business. It is easy to use if you are using 8x10 paper. the post office also likes the shape and size and doesn't charge an enormus amount to mail the envelopes.