- Our extra thick Booster MintFit Sleeves are optimally sized for your standard booster packs of ~10 cards (ie. Pokemon, and like sized packs). Each pack contains 50pc 100 micron thick polypropylene sleeves. Archival-safe PVC-free and acid-free premium material. Also featuring a V Shaped resealable lip - your booster packs are going to be well protected. Features: V-Shaped resealable lip 100 micron PVC and acid-free material Great clarity premium material Archival safe Sleeve tray Perfect to combine with our Booster Pack Top Loaders and Booster Pack Top Loader oversleeves. Sleeve dimensions: 73mm x 120mm + lip