From Gator, this Allegro Series Pro Bag fits a straight trombone or one with an F-attachment. It's a lightweight nylon bag with a thick double-banded cotton lining that cradles and protects your instrument during transport. A thick plastic base provides stability, and rubber feet protect the canvas. There's an internal storage bag for mouthpieces and an external pocket for additional accessories. The bag has both a shoulder strap and set of backpack straps.