I could open the adhesive closure after being closed. It just did not feel secure and I used scotch tape on some of them to make sure they stay closed.
Tired of licking hundreds of enevelopes to seal I decvided to spend s bit more for self-adhesive envelopes. What a thrill to be done in no time and no dry tongue cut tongue and lips and neat and clean. I should have done this long ago. Now sending out bills proposals reports etc. is easy and efficient. Instead of a wet desk from the stamping sponge it's all clean dry and done in about one third thetime it used to take. It makes me realize that pinching pennies is not alweays wise or fruitful. Spending a bit more can yield a lot more where it counts.
Easy to use. However several customers have reported receiving their mail in an unsealed envelope. In other words the adhesive is not very reliable. Will not purchase again.