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

Cools the entire neck area over a wide area with the cooling power of ice [Cools the neck area by -20°C compared to when not in use] The cooling power of ice cools the entire neck area, where major blood vessels pass through, over a wide area. [Maintains coolness (33°C) for approximately 150 minutes in an environment that replicates the midsummer outdoors (37°C)] Maintains coolness for a long time with the cooling power of ice. [Hands-free for comfortable cooling] Cooling is possible without using your hands, even when hydrating or resting. Also, the inner diameter of the opening is 54mm, so it is easy to put in ice cubes (approximately 30mm) that can be placed in a typical household. [Easy to carry] It can be folded, making it compact and convenient to carry. Also, it is a one-size-fits-all design, so it can be used by both adults and children.