I have always used the free USPS mailing labels and never had any issues. I decided to purchase these PolyMailers due to the Black Friday sale/I liked the print. Unfortunately, once I received them I noticed that the USPS labels peel right off. I’m concerned the label will fall off during shipping. I have to use a piece of packaging tape over the label to secure it which is an added expense. Again, I never had an issue with the USPS free shipping supplies. I reached out to their customer service to no avail.