❣️ Price negotiations welcome! ✨ First come, first served! ✨ Ships within 24 hours! [Product Specifications] S Size (for kids): 110g ± 10g, Length: approx. 110mm, Width: approx. 100mm, Neck circumference: approx. 31cm [Natural Ice Formation at 28°C Indoors, No Refrigerator Needed] Our cool rings use the latest advanced PCM material developed by NASA. PCM material is characterized by its quick solidification and slow melting, making it ideal for preventing heatstroke and combating the summer heat. Unlike the common 18°C freezing type available on the market, our product naturally freezes when left at room temperature below 28°C after use, allowing for repeated and easy use even without a refrigerator. [Up to 12 Hours of Continuous Use] Compared to standard cool rings, we have increased the PCM content by 70%. As a result, the cooling duration has been extended from a maximum of 8 hours to a maximum of 12 hours when used indoors. [Tested by the Japan Toy Safety Standard (ST Mark) and Leak-Proof] Manufactured in an ISO9001 certified factory, we have improved the manufacturing process and material quality, preventing liquid leakage due to damage during use, and allowing for over 15,000 repeated uses. Durability and safety tested in Japan by the Japan Toy Safety Standard (ST Mark) (Test date: May 18, 2023). Management Number...58-451-78-58※