I change sides, and air them, but launder like everything else when per week. They don't snag on the floor. They do not sag down on my skinny legs. "The socks provide a cosy and comfortable healthy without getting far too restricted or free. These are compressive without being constrictive."— https://300030467.wikissl.com/1203665/5_essential_elements_for_rhythmic_gymnastics_socks