A neck cooling ring made from a special material that releases and absorbs heat and cold repeatedly. Size M fits necks approximately 30-38cm. Suitable for various situations like home, outdoor activities, sleeping, commuting, and sports. No charging or batteries needed! Eco-friendly and reusable after cooling. Mild cooling lasts about an hour after solidification. Size: 2×15×18cm, Color: Aqua Blue Gradient.
