Are plastic or redrope (paper) expanding files more durable?

Across reviewers, heavy redrope/Tyvek-reinforced files like the Pendaflex line tend to last longer under heavy daily use, while polypropylene plastic files are lighter, water-resistant, and better for on-the-go transport. Specialist subreddit threads consistently flag that thin plastic dividers feel flimsy, so look for thicker PP (0.5 mm+) if you go plastic.