For a bit of history on this, the first sleeve we released in 2015 was too tight as reported by our customers, most wanted to be able to remove it and do drills both with it on and with it off. So, we made a new version that is looser, thus with moderate bat speed, it will come off. There are a variety of ways to keep it on, we have seen all of the following work: Rubber Band, Glue, Tape, Extra grip from Lizard Skins. Really it just depends on whether you want it to be permanent or you want to be able to remove it.