HYAY Toropical Gurade Medium Size Ice School Ring Brand: HYAY Hiyai; Item: Cool Snood; Product Name: Ice Snood; Gender: Mens, Women; Country of Origin: China; Other; Material: Body: TPU (Thermoplastic Polyurethane) Contents: PCM (Phase Change Material: Interchangeable Material) Solid, releases submersible heat when it changes into liquids, and absorbs melting heat when heating solids and cools liquids. Emits This principle causes heat storage and cooling. ■ Product Characteristics 1 This product naturally freezes in environments below 66°F (25°C), and can be used repeatedly. If the PCM material has become liquid, please cool it in a environment below 25 degrees Celsius or refrigerator, and harden it. It is also possible to quickly freeze in the refrigerator. It freeze faster than water, and is less condensation, so you can use it comfortably and prevent your clothes from getting wet. It absorbs body heat and helps prevent heatstroke by keeping a pleasant feeling for a long time. ■Product Characteristics: 2 Estimated freezing time: Refrigerator: Approx. 30 minutes Freezer: Approx. 20 minutes Cold (10 degrees Celsius): Approx. 30 minutes Tap water (approx. 16 °C): Approx. 60 minutes ■ Product Characteristics 3 Continuous time: Approx. 60 to 90 minutes ※In 25 degrees C to 35 degrees C environment; Related words: Heat stroke prevention, Cold sensation Cooling Workwear Site For work, outside festivals, camping, gardening, running, walking, summer, heatstroke prevention, cooling down naturally, freezes naturally, congealing, cooling, outdoors, construction sites, sports, warehouses, outdoor work, women, kids, kindergarten, elementary school, high school students, adults, family, pets, dogs, neck cools neck Neck Cooler for Work For school, welcoming parks, tropical nights, yards, housework, driving, travel, unit: (Inner diameter inner circumference) Weight: M 4.1 inches (10.5 cm), approx. 13.8 inches (35 cm), approx. 4.2 oz (120 g).