I have a set of the very nice plastic file folders Davidco used to sell. They are pretty colors, pre-stamped with “Inbox’ and other labels, and wear very well. They are very heavy, and papers slide out sideways easily. I use them in my office, but not for travel. The flimsy plastic ones are light, and papers are much less prone to slip out. Just brutal practicality, I’m afraid. I carry a thin Circa-compatible notebook with plastic covers instead of the gorgeous leather Circa notebook I could use instead- it’s just too thick and heavy. It’s not like luggage, where if you look carefully and are willing to pay more, you can get stuff that is light and holds up very well.