I’ve got a couple of the markbass keepers, they Velcro to the mb cab material, which was handy for stopping the bass from sliding, but if you don’t have the cab material they would have to Velcro around a handle or something
I’ve got 2 jazzes with D’addario tapes , one set about 7 years old and one about 5 years and they still sound great, all that’s happened is they have become very smooth and mellow