They ship in a pack of 2 sponges, one for light color hats and 1 for dark color hats.Hat Cleaner Sponge - Misc/MISC These sponges can be used dry or with a cleaning solution.. Brush your hat lightly in order to remove lint, surface dirt, and any loose nap.
It protects your hat by preventing shrinkage and maintaining it's true size.. If your hat is fitting too snug, the Bollman Hat Jack can also stretch your hat allowing your hat to fit better.