Structure of fiberglass or carbon fiber.
Covered: Made of nylon or leather, with available colours on website:
http://www.mbcases.com.br/en/product-category/colours-available
The MB case can be made with more than one color and blend nylon with leather.
Product Description
Including: 2 backpack straps, shoulder strap, mouthpiece pouch (for 3 mouthpieces) and sheet music and trombone stand bag fixed to the case with zipper.