envelopes used to forward sensitive communications; gummed flap does not seal easily to protect communications; would prefer envelopes to be available in peel-and-stick format
Several of the envelopes were glued together on the inside. Not the part where you moisten the flap but on the inside where the seams are. Instead of just placing a letter inside for example it would not fit unless you felt inside to separate the edges. A hassle when you have a large mailing.