1.Waterproof fabric, which can well protect the instrument from rain or other wet liquids
2.Wooden frame, sturdy and durable, can well protect the instrument from damage
3.Large space music pocket, you can carry more musicbook with you
4.YKK zipper, strong and durable
5.Internal high-density foam, sponge and soft flannel, can protect the instrument well
6.Trolly case with wheels,2 pcs trombones easy to carry
