I swap sides, and air them, but launder like everything else once every week. They do not snag on the floor. They do not sag down on my skinny legs. My favourite feature on almost just about every pair of Bombas socks is definitely the cushioned footbeds in its ankle https://daltonmcpdp.gigswiki.com/5373432/getting_my_copyright_down_the_socks_to_work