When I got these, they were awesome. Good fit, comfortable and kept my feet dry. I wore them constantly for a few months, then the bad thing happened.  I left them outside on my patio on a hot day, and they shrunk at least a full size. After a Google search, I learned that this has happened to a lot of people. I tried re - heating and stretching them out, but they're still too tight. It sucks that I have to replace them after having them less than 4 months. It would be nice if they came with a warning.