I swap sides, and air them, but launder like everything else after per week. They don't snag on the floor. They do not sag down on my skinny legs. Wandering_About mentioned: They are what I wear for non-Winter season hiking with Lone Peak path running shoes. "I have worn these https://israelukgxo.win-blog.com/12872573/the-basic-principles-of-wright-socks