Having such a triple pack bought at Bewerbungsmappen from the supermarket and which were already partly dented in retrieving for the terminal strips for the writing, I have ordered these portfolios here. The very next day they arrived in the mail! Just great. And the material is a thick corner - definitely stable from the other stuff that you can buy so. Nothing bent, even 15 sheets could be quite good in the terminal strip push (since I had one or the other problem in the other folders).