The protect mute bag looks smart but hasn't lived up to my expectations. I can only get 2 or 3 mutes in it, which isn't enough sometimes. It has an interior decider which attaches to the inside of the bag with velcro, but that doesn't stay in place very well. The zip sticks a bit. It is supposed to attach to the protect trombone case, but it's just a plastic clip and is actually quite impractical to carry it that way. It doesn't really offer anything that a regular bag could do.