Bickmore Products. Ultra-X Hat Cleaner was specially formulated to clean felt hats. The powder removes a variety of the most common water and grease based stains like perspiration, fingerprints, and baby oil. This gentle formula prevents discoloration and will not leave a chemical residue ring around the area of application--a common occurrence with similar products. This easy-to-use spray is environmentally friendly and will not harm felt or fabric. Comes in 5.5 ounce container. Please note that aerosol cans can only be shipped via UPS Ground.