Size S: 21cm - 23.5cm Color: Black Product Description: Developed by a chiropractor. Clinical trials conducted by a third-party testing organization. As a result, five effects were proven: thermal properties, antioxidant effects, increased calorie consumption, increased alpha waves, and stress reduction. Simply wear the skin-friendly silicone rubber band on your ankles. With moderate elasticity, it forms an arch with 2-point support + 1-point support, supporting various physical problems. Recommended for those with stiff shoulders, lower back pain, knee pain, improved sports performance, and concerns about poor posture. Development Story: It is said that about 70% of Japanese people have flat feet, and the idea of how to address flat feet was the beginning of the development of the Ankle Band. Just by wearing it on both feet, the center of gravity stabilizes front, back, left, and right, supporting beautiful posture. That is the Ankle Band. Effects: Posture support Stiff shoulders, lower back pain, knee pain, leg swelling, body shape problems, hernia, tenosynovitis, urinary incontinence, floating toes, poor posture, sports injuries, improved sports performance