These are single-tooth geta (Japanese wooden clogs) that cultivate a sense of balance. They are also used in kindergartens and nurseries, and are popular as a way to naturally use the soles of the feet and core muscles. As a mouth educator, I incorporated them into my home as one of the indoor activities to "develop the foundation of the body." Because of the instability of the single tooth, the soles of the feet, toes, and inner muscles, which are usually difficult to be aware of, are activated. ✔ Supports the creation of foot arches ✔ Prevents flat feet ✔ Builds a foundation for posture ✔ Improves core balance and sense Almost falling ↓ Regaining balance on your own ↓ Trying again Recommended for core training indoors. Of course, they are also good for outdoor use. ※ Since we used them indoors at home, the soles are not damaged. Reference price: Rakuten/Amazon 7,490 yen~