Toss in the wash with cold water. Air dry. Boom.
Very Comfortable and Attractive
"I'm a 39 Euro fit and took advice of reviews and ordered a size 8. I have average feet. I primarily purchased these as house shoes. The feel like a new pair of Birkenstocks when you slip your bare foot in. The good news is that "the new" tactile feeling of softness lasts (even through a wash). The Cheetah is fun and would certainly work beyond the house. I have compressed vertabrae and these provide comfort AND nice support with or without socks."