Brand new, unused! Opened for photography purposes! Size: L Color: Black This is a neck cooling ring using PCM (special cooling material) that freezes naturally below 26°C, keeping your neck cool and comfortable. It can be used repeatedly, making it perfect for heatstroke prevention. 【Product Details】 ・Product Name: Cool Band Plus ・Material: TPU / PCM ・Cooling Temperature: Solidifies at approximately 26°C or below 【How to Use】 ・Simply cool it in cold water or the refrigerator! ・Once solidified, put it around your neck to cool down. ・When it melts, cool it again and use it repeatedly. Recommended for leisure, commuting, going to school, outdoor activities, sports, etc.