Color: Blue 【Dual Cooling & Instant Cooling】 This icing ring incorporates a PCM (Phase Change Material) cooling material, achieving instant 0°C cooling through dual cooling with ice water. It's perfect for heatstroke prevention and provides long-lasting cooling effects during sports in the scorching sun or outdoor work. The internal PCM material is less susceptible to external temperature fluctuations, maximizing cooling time. The "high cooling efficiency" that instantly lowers the perceived temperature is its greatest feature, ideal for the summer heat and cool-down after exercise. 【Full Body Icing & Large Contact Surface】 The U-shaped design and a large 6cm width (192cm²) cool the neck, and can be applied to a wide range of areas such as shoulders, knees, and thighs. The hands-free design doesn't get in the way during sports or work. It has a wider contact surface than conventional neck coolers, providing sustained deep cooling. It's also effective for reducing head fever and relieving muscle inflammation. 【5-Hour Cooling & Instant Cooling with Ice Water Replacement】 The 750ml large-capacity design allows for plenty of ice water, achieving up to 5 hours of continuous cooling. Unlike conventional cool neck rings, there's no need to freeze it in the refrigerator! If the water temperature rises during use, simply open the spout, discard the warm water, and refill with fresh cold water to instantly restore the cooling effect. The 4cm extra-large diameter water inlet allows ice cubes to pass through without clogging, making it easy to add and remove water, and clean after use. The translucent body makes the water level easy to see. 【Gentle Eco-Friendly Material & Leak Prevention】 Made with skin-friendly PVC material, combining durability and flexibility. It can be freely adjusted to fit around the neck without any pressure. The spiral PP cap has a 360-degree rotating sealed structure, completely preventing water leakage even during intense exercise. Anti-condensation processing eliminates wetness and stickiness on clothing. It uses environmentally friendly and safe materials, making it safe for children to use. The design is resistant to damage and won't deteriorate with long-term use.