E.T.
They last a month or a bit less. I don't know what dipping is, so can't help there. There isn't any upkeep other than the fact that you have to go back every 3-4 weeks to have them redone as your regular eyelashes fall out. It takes quite a while to get the first set put in (a few hours) because they glue each fake eyelash to a real one. One at a time. Then when you go back in 3 weeks they do about a third of that work. I think you can swim with them, but you have to be careful not to rub them too much or hurt the glues with your makeup, so you would need to check to see if the chemicals in the pool you'll be swimming in can mess up the glue.