I swap sides, and air them, but launder like everything else once each week. They do not snag on the floor. They don't sag down on my skinny legs. I'm in the midst of Alabama and believed a similar thing. About 20 years in the past I bought some smartwool https://charlierqyza.snack-blog.com/32419936/the-best-side-of-over-calf-socks