This is one set of the "Tsukekae Sonomama" Standard. I've been using it for about a year, and it still works fine. It has been bleached and cleaned. It's been dried in a well-ventilated area, but please understand that there might be some slight dampness. If you are sensitive to smells, please refrain from purchasing. I still have some used ones available, so if you'd like to purchase additional sets, please let me know.