She is using her dad's old trumpet, and the original case was very heavy and the hard handle was painful, even for me.

The handle on the side is a hindrance when opening or closing the zipper; and the case wont sit flat on the ground with the lid open, it tends to keel over, even with the trumpet in it.

Less bulky, lighter than his hard case and the handle and straps make it easy to commute with a backpack as well