WE use this product to hang on the walls of our classroom and use for family daily communications. they hold a lot and get beaten up by our families. Paper clips, pens and other odd things get stuck in them and they hold out for the whole year.
I have two Poly Jackets #50990 in front of me on my desk. One is about 2 years old, the other less than a year. The difference is definite! The older one is actually a great, useful filing/organizing tool. The other is so flimsy and weak - its completely useless. Even nearly full - you can't pick it up without bending in half. Totally annoying, because the price was more if not the same. Pleae reconsider reverse enginering Esselte!