ZAMST Ice Pack for Heat Daily One Size Fits 387000 Neck, Cooling, Relief, Golf, Tennis, Life, All,

The entire neck area is cooled over a wide area using the cooling power of ice. [Cools the neck area by -20℃ compared to when not in use] The cooling power of ice cools a wide area around the neck where major blood vessels pass through. [Maintains coolness (33°C) for approximately 150 minutes in an environment that replicates the conditions of a midsummer outdoors (37°C)] The cooling power of ice maintains coolness for an extended period. [Hands-free for comfortable cooling] You can cool down without using your hands, whether you're hydrating or taking a break. Also, the inner diameter of the opening is 54mm, so you can easily put in ice cubes that are typically used in households (about 30mm). 【Easy to carry】It can be folded, making it compact and convenient to carry. Also, since it's a one-size-fits-all design, it can be used by both adults and children.