Product Contents Sakurajima Lava Ball 1.5kg, Net for Sakurajima Lava Ball 1 piece How to Use Place the Sakurajima Lava Ball in the net and submerge it in the bathtub. After use, remove it from the bathtub and allow it to air dry. This will prevent odors and sliminess, allowing you to use it for a long time. *Please be careful as rough handling, such as rolling or hitting the product, may damage the bathtub. There will be no scratches on the bathtub within the scope of normal use. Sakurajima Lava Ball Benefits The far-infrared effect promotes blood circulation, promotes sweating, relieves pain, and is expected to have a relaxing effect due to the action of negative ions, leading to better sleep. Origin of Sakurajima Lava Ball Sakurajima Lava Ball is a radium stone made by processing volcanic rock ejected from Sakurajima. Radium stones are said to have two main functions. There are rhyolite-based radium stones, which are said to enhance immunity, and granite-based radium stones, which are said to enhance cell regeneration. Sakurajima lava is a rhyolite-based radium stone. Himekawa Yakuseki, famous for its rhyolite, is recognized in the medical world as a tiger stone in Kampo medicine. It is also sold as a tiger stone in China, and is a very expensive radium stone, selling for nearly 1,000 yen per gram. In addition, since Sakurajima is designated as a national park, it is not possible to take out lava, but our company negotiated with landowners who own private land in Sakurajima, obtained permission from the landowners, and succeeded in commercializing the product after collecting and processing it. We also sell 1.0kg, but the feeling is different when using 1.5kg. Is the bath temperature warmer than usual? Do you feel warm enough to sweat after taking a bath? Is the bath water light and smooth!? You can experience such comfort more strongly with the 1.5kg version! *This product is made by processing lava stone, so lava stone powder may come out during the first use. You can simply rinse away the powder after bathing. The powder is also expected to have the effect of removing sliminess from the pipes. Product images are samples. The package may be changed to reduce shipping costs when shipping.