I have kept these stored in a bag. There aren't any major stains, but since they are shikishi boards (colored paperboards), some have slight marks on the back. Please understand that these are being offered at a low price. Precure Shikishi (Colored Paperboard) Limited Edition Cure La Mer Cure Majesty Cure Finale Cure Butterfly Cure Milky Cure Macaron Cure Earth Delicious Party Precure Hugtto! Precure Futari wa Precure