We use these for trip sheets and for keeping receipts in for our business. We also use them for bulky mailings and turning freight bills in. I also use them to store tax receipts at the end of the year. Purchasing them like this really saves me money. These are my go to envelopes and prove invaluable when storing business receipts for different purposes; since they easily fit in a folder and can be paper-clipped to pay sheets all of our various records and receipts stay in one convenient location.
I had a mailing of 4 8x11 pages that were folded in half. The envelopes were easily opened and the insertion went without any problems. The address labels were preprinted on sticky lables and were placed on the envelope again without effort. The return address was made with a pre-inked stamp and the address did not smear or run. I used glue sticks to seal the envelope and this also went on without any problem or effort. The envelope is light weight but sturdy and went through the mailing system without any problem arising.
Envelopes are easy to address and seal! Love it! Also allows for plenty of paperwork to be mailed without having to use a bigger envelope. My office uses about one box of 500 per month and it's great to be able to order online with delivery or purchase in store.