I purchased this new and stored it without ever using it. I threw away the box... Athlete: Yuki Yanagita Retail Price: 18,700 yen A high-performance model that truly shines in extreme situations. The design evokes a sense of luxury with its natural stone-like brilliance. The top design features the EXTREME logo and the Phiten logo on the back, creating a luxurious feel. The clasp is engraved with the EXTREME logo and the Phiten logo on both sides. The material is made of skin-friendly and durable acrylic. It's lightweight and water-resistant, making it ideal for sports. Recommended for track and field, baseball, golf, tennis, and more. This is a high-power necklace that uses Metax. It has a transparent feel and a luxurious look like a natural stone. It's lightweight and water-resistant, making it perfect for everyday use as well as sports. The clasp is made of aluminum. It can be easily attached and detached with one touch.