KEEN WEAR MASKS Contents: 2 masks Size: XS/S Color: Gray Material: Body: 100% Cotton KEEN is a popular American outdoor footwear brand that sells sandals and shoes. This mask has a cute KEEN logo on it. ☺︎ The size is XS/S, but since it's an American brand, it shouldn't be too small for Japanese people. I received this as a special gift from the staff when I made a purchase at a KEEN authorized store. I haven't had a chance to use it, and it has been stored at home. There are some scratches and minor marks on the box from storage, but the contents have never been opened. Please refrain from purchasing if you are sensitive to this, as it has been stored at home. Returns are not accepted.