Specifications: Name: Cooling Cool Circle Color: Gray/Black/Blue Material: PVC PCM Use: Cool And Cool, Ribbon To Relieve Dryness And Heat Description: NATURALLY FREEZES AT 24°C+28°C: The Ice Neck is newly upgraded with crystals on both sides of the neck that will naturally freeze below 24°C, and crystals on the back of the neck that will naturally freeze below 28°C. It does not require any electricity or water supply, which is energy efficient and good for the environment and your wallet. As the aorta is located in the neck, cooling that area cools the blood throughout the body. It freezes in ice water for about 20 to 30 minutes and in the refrigerator for about 20 to 30 minutes, the lower the ambient temperature, the faster it freezes. Depending on the outdoor temperature of 2540°C, it can be used for 60120 minutes. USES PHASE CHANGE MATERIAL & REUSABLE: This ice neck uses a material called phase change material, which is said to have the property of maintaining a constant temperature by absorbing and dissipating heat. It maintains a constant temperature range even when the ambient temperature rises and can keep you cool. It maintains about 28°C to prevent overcooling and quickly regulates body temperature for a refreshing change. You can simply wear it around your neck on hot days or during exercise to cool your body and maintain a comfortable body temperature. You can use it over and over again. NON-CONDENSIONAL & COMFORTABLE TO WEAR: This neck cooler is non-condensing, unlike ice, etc., as it is anti-condensing. Don't worry about your clothes or hair getting wet. Even if it melts once, just put it in a cool conditioned space and it will freeze again. As a result, it can be used naturally and economically and has a smooth, comfortable fit that won't condense. It stays comfortable even after prolonged use and feels smooth even when you sweat. It provides a comfortable cooling experience even in hot weather. Can also be used for children in moderate temperatures: it is a U-shaped neck-hanging so it will not put pressure on your shoulders and neck. It has a sleek, minimalist design that won't come off even when you're exercising. Cools your neck and reduces heat throughout your body! This Ice Neck has been specially developed to combat high temperatures. It freezes at 28°C to maintain an optimal cooling temperature (28°C), so it doesn't get too cold and there is no risk of frostbite. It has a gentle and comfortable cooling sensation, making it safe for children to use. WIDE APPLICATION: As an energy-saving cooling link, it can be used in various scenarios under the scorching sun, such as commuting to school, office, changing clothes, driving, hiking, watching sports, jogging, riding, fireworks displays, festivals, golfing and so on. If you relieve the heat and discomfort of summer humidity, you can wear it day long and stay comfortable! Package: 1pcs Cooling Cool Circle