Toss in the wash with cold water. Air dry. Boom.
Comfy
"These are so comfy but narrow. Because they are narrow they tend to rub the side of my foot a bit so I’ve stuck to wearing them with full socks and long pants to prevent rubbing. Fit wise they’re true to size. I have a number of other styles by Rothy’s but these are not my favorite pair only due to narrowness. Would maybe go half size up in these if you have wide feet."