I ordered these after I read the reviews. I wish I didn't purchase them. We use these sheet protectors for certified documents. It is very difficult to slide the document into the sheet protector - this product is not worth buying. I will go back to the standard or heavy weight sheet protectors.
Last semester I used the heavy duty sheet protectors and I quickly ran out of space in my binders. I had just grabbed a box off the shelf I honestly didn't realize that sheet protectors came in different grades. Well this semester I bought most of my supplies at Staples.com as upposed to in the store. I found out that the economy weight were much cheaper plus it also said that I would be able to fit much more in my binder. I was amazed they are thinner but I haven't found that they are any less protective. I don't feel like I have to be more gentle with them I flip those pages as furiously as ever without a problems. I call that a win win!