They come off easily when you want to take them off. It feels like industrial strength glue they use on nicotine patches
Of course you can swim with them. They don't stop any aspect of life except what they are designed for!!!
I have been using the patch for about six months now...and its great had no problems at all with it. I used to wear it on my upper arm but it drew too much attention...especially when i was out, i'd get some funny looks when i had a cigerette cos people thought it was a nicotine patch!!! once i explained it to a girl she turned round and said to her boyfriend that i was all prepared for a one night stand...yeah right after that i wear it on my thigh and no-one sees it except dp of course