There are plenty of good reasons why Ultra-Pro is recognized as one of the safest and best pagemakers in the sport and fantasy card business. Their pages are PVC-free, which means there are no oils in the pages that can eat away at your collection. Also, the pages are very sturdy and handle your collection quite well. One note, however, is that I wouldn't put more than two cards per sleeve. In fact, I'd only put more than one card ..