Toss in the wash with cold water. Air dry. Boom.
Horrible fit
"I bought my regular size and the material is so loose they feel dangerous to walk in. The length is great. I even added another footbed from another shoe to take up some room and then they just looked awful. I can’t return them as I bought them on a $10 off sale- no returns. I was shocked. I live the color but this was a huge mistake. Very disgusted."