Thank you for viewing. This is wave sand from the zero-magnetic field, Bunko Pass, which has a strong wave. Somatids (microscopic life forms with will and intelligence) that have lived since ancient times when the Central Structure Line was cut are still alive. "Somatids are the strongest things that create "Ki" (life force), and they are the basis for conditioning our bodies, purifying energy, and changing the bad waves of the place." Capacity: 1 kg I sleep with it under my lower back and head. I hope this will be helpful for your health.