Price not negotiable. NEW color (international model) inspired by the global (earth) model: Black x Navy A new silicone necklace that can be attached and detached with a clasp. Made of silicone that is resistant to sweat and rain, making it recommended for sports. For athletes and street fashion. Of course, it also matches casual outfits. Retail price: 9900 yen Total length (circumference): M (approx. 51cm) Material: Logo/cord part (silicone), metal part (aluminum) IFMC. (Ifmic) products contain aggregated functional mineral crystal (IFMC.), and wearing it can be expected to improve core stability, balance, and recovery.