Decided to go to my local indoor pool and asked them if they allowed people to swim in clothes. They said that was fine. I asked them if I could do it in what I was wearing being t-shirt, sweatpants that looked like leather ones and a big puffy down jacket. They said go ahead and that more people should practice swimming in clothes as it is difficult and that is most likely when you will end up in the water. I had a good time and will be going back for more practices.