The Marcus Bonna double clarinet case is one of the lightest and most compact cases available on the market! It holds the Bb and A Clarinets comfortably with room for mouthpieces and accessories. The structure on the inside is adjustable to fit the needs of your particular instrument. The outside cover is a nylon material and has pockets for sheet music. This case also has backpack straps, a shoulder strap, as well as handles.