Just floating in the bathtub to catch body oils! Bath Water Stain Prevention Product Cleans reheated bathwater and reduces cleaning effort. 3-layer structure absorbs body oils. ● Polypropylene, polyethylene, nylon, etc. ● Replacement目安: 150 days (150 uses) ● Made in Japan Will be pressed to reduce thickness and shipped via Yu-Packet Post. Please be aware of this. We are looking forward to purchases from those who understand that this is a home-stored item.