I was getting sweaty, I was worried about slippers being damp or smelly, looking for washable slippers. There are three colors, it is good to be able to identify individuals. It is good to have not only size M but also L. But I want another smaller size (S size) if I want a greed. Also, since the front is open, summer is very good, but it is cold in winter, so I am glad that the front of the same type is closed. Rinse with a washing machine, it will be useful as it dries quickly. We are looking forward to future developments.