◎ These are about half the size of regular cloth zori (Japanese sandals), and simply wearing them can: * Strengthen your toes * Improve the arch of your foot * Naturally correct body misalignment Various health benefits can be expected. This is not a medical device. These are the impressions of many people who have worn them. ☆ Even those without leg problems say it feels like their feet are being massaged (#^^#) Also good for foot relaxation. Recommended for those with: * Lower back pain * Knee pain (want to strengthen legs) * Bow legs * Hallux valgus (bunions) * Sensitivity to cold * Posture improvement * Strengthening the body's core * Improved performance in dance and sports * Tendency to trip easily * Relaxation * Toes that spread apart Materials: * The sole is made of a single thread of cotton T-shirt knit fabric, woven without seams for a comfortable and firm feel. * The thong is made of cotton with fluffy polyester cotton filling. * PP rope is used for the core. Washable Approximately 9.5 cm x 7 cm Adult free size (approx. 22-25 cm) Please wear them with your heels firmly on the floor. You can adjust them yourself. Can also be used for sleeping. If your feet get cold, wear them with five-finger socks or tabi socks.