Eco Ashiraku - Harnessing the power of scallop shell and charcoal, Eco Ashiraku offers antibacterial, deodorizing, and heat retention benefits. It helps maintain body balance, supports the Achilles tendon, and promotes athletic performance. Designed to aid in fall prevention, it can also help reduce lower back and knee pain, as well as relieve symptoms such as leg cramps. Color: Black. It can also be worn on the wrist. Available sizes are Small, Medium, Large, and X-Large.