Cool rings purchased online from SUO's official store. We bought them for the family, but we hardly used them, so I'm selling them. * Two pink ones are size S (for children and dogs) * Two black ones are M (for adult women) and L (for adult men) The original price was about 2700 yen each, so I'm selling them cheap because I don't need them. Therefore, please understand that I cannot offer a discount. m(_ _)m SUO RING 28°ICE Collection. The SUO ICE series is an innovative product that utilizes organic and natural plant-based PCM (Phase Change Material). This product has the property of freezing and melting depending on the temperature environment, absorbing and releasing heat. As a result, it quickly and efficiently regulates body temperature, providing a comfortable cool-down. Because it uses organic materials, it is environmentally friendly and highly safe. It has a specific gravity about 30% lighter than water, making it easy to handle and safe to use repeatedly. In addition, SUO products are specially processed and have no protrusions on the TPU joints, making them smooth. The design is on the inside, preventing paint peeling and skin irritation when worn. 【Features of 28°】 * Long-lasting, pleasant coolness Gentle coolness, perfect for those who don't like things too cold * Solidifies in environments below 25-28°C * ◎ for those who want to use it casually By cooling gently at a moderate temperature, it reduces the risk of heatstroke. It cools the base of the neck and effectively cools the entire body.