Here's a partial transcription of the manufacturer's description: DAC Original Trombone Protection By weaving fine microfibers, this "DAC Original Microfiber Cloth" effectively wipes away oil, dust, and other debris without scratching your valuable instrument. We've created a drawstring-type protection using this fabric! By wrapping your instrument in this protection and placing it in its case, you can reduce the entry of dust and debris, and protect your precious instrument from various accidents inside the case. Please try it to keep your valuable instrument clean. It is compatible with open wrap tenor trombones and even bass trombones. * If you are concerned about the drawstring hitting the instrument, you can remove the string and use it. * Some cases or instruments may be difficult to use with this product. Please contact us for details. Size (flat): Width 34cm x Length 90cm The item for sale is red. I used it with a Getzen bass trombone 3062AFR.