Microfiber Polish Cloth.Premium materials.Light-quality soft.Deluxe care cleaning.Washable & reusable.This microfiber Polish Cloths are ideal for cleaning not only violincello,double bass but also many kinds of wind instruments such asTrumpet, Saxophone, Flute, Trombone, Tuba etc.this is washable & reusable. has a longer lifespan when properlmaintained of prevent secondary harm for environment.