CLEANING SPONGE / SPOT REMOVER: This combo pack is what you need to get out those pesky stains on your felt hat. The Spot Remover is an aggregate based cleaner that can be used on all shades of hats formulated to remove most stains (1.76oz granules). To be used with the Cleaning Sponge which easily wipes away dirt, dust and grime. For best results use a different sponge for light and dark coloured hats.