Thank you for viewing. This is a Muji neck cooler. I purchased it but never used it, and it has been stored at home. - Product Name: Cooling tube - Size: M (approx. 14 x 16cm, inner circumference 34cm) - Color: Gray - Price: 1490 yen - It freezes naturally at about 28 degrees Celsius and cools the neck comfortably. It can be used repeatedly.