Soft microfiber swab with high absorption capacity to clean the inside of the instrument. Made of Microfiber + bamboo and silk. • BG swabs absorb quickly and efficiently to help keep your instrument in optimum playing condition. • 2 Metal weight inserted into a tubular part of the swab to facilitate passage through the instrument. • This is a microfiber swab plus bamboo and silk allowing high absorption throughout the instrument. • Washer safe with a lifespan of more than 5 years.