The Thomann Bb/F Trombone Trekking Case shows exception endurance to provide protection to your trombone. It is suitable for trombones that comes with and without quarter valves. This case has an outer shell made from Rok-Tex material that offers water-resistance to keep the instrument safe from moisture and wetness. The large external pocket is ideal to keep music sheets. This case features rolling wheels and an ergonomic handle for a convenient transportation.