Asahi Kaseis unique non-woven acrylic fabric removes "rough and "slim" in the bathtub even with water alone. No abrasive material, so it can be used safely on walls, floors, and mirrors. The shape of the mat is molded, so it is easy to hold even the large size used for baths, and it fits into grooves and curved surfaces, so it can be washed thoroughly. / The middle layer uses a de-membrane sponge for better drainage. / It can stand up on its own, so you dont have to worry about placing it.