Cold Therapy Neck Collar for Sun Protection Hiking Jogging Reusable Chilling Gel Technology Product size about : 21*20*7.5cm/8.2*7.8*2.9' Product color: As shown in the figure Product material:pvc product features: Powerful cooling: This ice ring can be customized to add water or icecube, and the ice and water can be cooled double, instantly bringing a 0° cool feeling. It is an ideal choice for heatstroke prevention. Even when exercising or working outdoors in the hot sun, it can provide a long-lasting cooling effect, whether in the hot summer or after exercise, it can instantly reduce the body temperature. The 4cm super-large water inlet is not easily blocked by icecube, which is convenient for water filling, pouring and cleaning after use. The translucent bottle body design makes the water filling amount clear at a glance. Large area coverage: The U-shaped design wraps the neck for a cool feeling and can cover a wide range of parts such as shoulders, knees, and thighs. The hands-free design will not get in the way when exercising or working. The contact area is larger than that of traditional neck ice rings, and the cool feeling is long-lasting and deep. Instant coolness with ice water replenishment: The 720ml large-capacity design allows a large amount of ice water to be injected to achieve continuous cooling for up to 5 hours. Unlike traditional neck rings, there is no need to freeze it! During use, if the water temperature rises, just open the spout, pour out the hot water, and refill with cold water to immediately restore the cool effect. Leak-proof: Made of PVC material, Sturdy and flexible. The bottle can be freely adjusted to fit the neck, comfortable to wear, and will not feel oppressive. It can completely prevent leakage even during strenuous exercise. Anti-condensation technology effectively prevents clothes from getting wet and sticky. Environmentally friendly and safe materials are used, so children can use it with confidence. It adopts anti-breakage design and will not age even after long-term use. Applicable to a variety of environments: In summer, ice water can be applied to the affected area to prevent heatstroke and cool muscles; in winter, warm water can be applied to the affected area to relieve dysmenorrhea and shoulder stiffness. Suitable for various occasions such as sports, outdoor, and home. It can be used as a heatstroke prevention artifact when parents and children go out. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can contact us at any time. We will give you some suggestions, but for your reference only. Shipment includes: 1 pc Ice Collar