Tressie is a high-touch musical instrument cleaner made from Torays signature fine technology and micro sponge. The surface of the Tressie cloth is made of over 220,000 ultra-fine fibers per square inch, so it can not only remove small debris, but also stubborn oil-based stains that traditional cleaners couldnt clean. (1 to 20,000 bottles of general synthetic fibers). Ideal for cleaning silver and lacquer finishes, no lacquer brass and wood tubes. It can also be used to clean old oil from the piston. Since there are no special treatment or processing with chemicals, it will maintain excellent cleaning effect even after repeated use. It also returns to its performance by washing.