Music Nomad MN731String Instrument Microfiber Polishing Cloth for Violin, Viola, Cello, and Bass. MusicNomad’s String Instrument Polishing Cloth prolongs that fresh from the showroom feel through our superior design, quality and value specially designed for Violin, Viola, Cello, and Bass care. Microfiber is a revolutionary material containing 90,000 cleaning microfibers per square inch. Our cloth’s super soft, lint-free construction has a non-hemmed edge to avoid scratching your prized instrument. MusicNomad Products are used by worldwide by musicians, repair shops, collectors & instrument makers. 12″ x 12″.