From the website: The famous seaweed (eelgrass) bath of "Hama no Yu" in Obama City, Fukui Prefecture, is now available as a bath additive! This is a limited-edition bath additive that can only be enjoyed at the Koshi no Yu Group! The "seaweed (eelgrass) bath," also known as the "bath of immortality," is derived from the legend of Yao Bikuni, a woman in Obama who lived to be 800 years old, remaining young and beautiful. Yao Bikuni is said to have eaten the flesh of a mermaid and become immortal, but it is said that the model for the mermaid was the "dugong," which has long been known to eat seaweed (eelgrass) that grows naturally in the sea of Obama. The "seaweed (eelgrass) bath," which contains a lot of minerals and skin-beautifying ingredients, plus eelgrass extract, leads to youthful, fresh, and moisturized skin. The popular comedians EXIT also actually bathed in the Hama no Yu's famous "seaweed (eelgrass) bath"! This is a large-capacity pack that can be used about 20 times. You can easily enjoy the seaweed (eelgrass) bath at home anytime. [Cosmetics for bathing] Contents: 500g Product name: DF Bath Salt "Yao Hime" Contains moisturizing ingredient eelgrass extract Type: Bath salt