Product Description: Powerful cold insulation that realizes a world of below freezing spots that wont melt. Coolers are cooler than ice and have twice the cooling speed. The freshness of the fish caught is also different; it is perfect for fishing or outdoor use. Precautions for Use: Freeze completely before use. When using it, make sure to dial the refrigerator freezer with the strongest of the competition. If the refrigerator does not reach -4°F (-20°C), it may not freeze. In addition, if frozen over the top of the ice chunky kun, it may not freeze. As there is a risk of frostbite, please do not expose it to the skin for a long time. In addition, when touching the skin, please wrap it in a towel. We recommend storing in a location that is not exposed to direct sunlight or in a freezer. Take care of sharp objects and protrusions. If the contents are damaged or leaked, please wipe it with a wet towel.