RETO Leto Sports Necklace Daichi Kamino "RETO" means "challenge" in Spanish. This is a new sports device that marathon runner Daichi Kamino is challenging, unlike anything anyone has seen before. *Many runners love it! Athletes from schools that participate in the Hakone Ekiden use it! Size: S Color: Blue Accessories: Box Condition: Unused, but please understand that there may be some scratches and dirt from storage. Features as a sports necklace: Designed for use during sports, considering reactions to sweat and sebum, the necklace body, chain, and various parts use materials that are considered unlikely to cause allergic reactions. This specification allows you to fully demonstrate your performance.