I think boiling water might mess up the velcro but thats replaceable. Not sure if it’ll weaken the glue but I imagine it wouldn’t help glue (but what do I know). I do know I think it looks good the way it is. If it hinders you walking then I can see messing with it but if it doesn’t leave it. If you need more room at the knee you can always trim a bit at the bottom. As for the snaps I didn’t use snaps so I can’t answer those questions. Sent from my iPhone using Tapatalk