These indoor shoes are treated with antibacterial and deodorizing properties and are machine washable. I wrote my name on them and used them for only one day. Unfortunately, I couldn't use them because the facility didn't make any noise, so I couldn't tell where my elderly mother was. I purchased them at Ito-Yokado. - Brand: Ayumi - Size: M 22.0〜23.0 cm - Features: Machine washable, antibacterial and deodorizing treatment, easy to walk in Thank you for looking.