They make bags that are covered in cloth, by hollister its the new image line, and they are much nicer.
Your bag should not come off in the shower, i spent 6 hours in the hot tub on numerous occasions, gone swimming, gone in the ocean, taken tons of showers, with no problems, after i got my system down that is.
At first i was having trouble with leaks after showers or water, it was the skin prep i was using. You should not be having trouble at all.
Tell us, exactly, what you use and what you do, and we can try to troubleshoot for you.
UC for 8 years, before finally kicking its butt and having a permanent ileostomy April 17 2007!
-I have gone to find myself, if i get back before i return, keep me here-