It is laid on the floor of a bathroom for preventing a person from slipping, and it is also used in oshiire (a built-in closet in a Japanese-style room) during the rainy season for preventing the goods in storage from molding.
滑り防止のため風呂場の床に敷いたり、梅雨時には収納物のカビ発生予防のため押入れの内部に入れて使われている。