I've switched to these envelopes because the clasped ones I used previoulsy had become cumbersome and these have worked out perfectly. The seal is tight and they are a decent weight for our light mailings.
We use these all the time. The seal is really good ad good quality. Recommend them if you are doing a lot of mailings and want something that shows quality. We order large amounts at one time since we mail many packages each week.
I do 450 mailings every 2 weeks and tried a lot of different products..glue tab standard kraft envelope peal and stick white envelope peal and stick kraft envelope and these press stick envelope. These by far are the best time saver which makes the best value for my money. The quality is good I haven't had any complaints of open envelopes from my customers. My only complaint is they aren't stocked in the retail store for me to get a few when I run short. Now I stock up and keep plenty on hand.