Thank you for viewing. I purchased this on Rakuten and used it in the bathtub for three and a half months. I regularly washed and sun-dried it, and since I have 24-hour ventilation in the bathroom, I think it's relatively clean. Because it has a cushion, I think it can be used from a young age. The cushion has been washed in my home washing machine and heat-treated. Also, the bathtub has been cleaned with bathtub cleaner and sun-dried. Thank you. *It will be sent in simple packaging, with bubble wrap around the corners. For those in Okinawa, shipping costs will be higher, so we will charge separately. Please do not bid.