Brand new, unused Price not negotiable L size x 2 [Insect Repellent Function] Unlike anything on the market before, this product not only provides a cooling effect to combat heatstroke but also incorporates 100% plant-derived insect repellent ingredients. It has a scent similar to menthol, making it safe for children to use. We have developed this insect repellent cool neck ring. [Semi-Permanent Reusable] Our cool neck ring uses the latest "PCM material" and freezes naturally below 28 degrees Celsius. When the temperature exceeds 28 degrees Celsius, it absorbs heat, providing a cooling sensation and a comfortable feeling. Once completely melted, it can be quickly frozen by placing it in cold water or a refrigerator, making it eco-friendly and semi-permanently reusable.