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A camper staple! Amazing cold retention that can even freeze fish! Also great for power outages.

Maintains a surface temperature of -16℃ for a long time! Approximately 8 times the cooling capacity of regular ice packs!
With a surface temperature of -16℃ and approximately 8 times the cooling capacity of regular ice packs (in our experiments), it has an amazing cooling capacity. To prepare for use, simply place it in a household freezer for about 36 to 48 hours. It can be used for a variety of purposes, such as freezing freshly caught fish on the spot to keep them fresh, or freezing towels to use in the summer.

Prepare for power outages and disasters
It can also be used as a preparation for sudden power outages and disasters.

Made of natural materials, made in Japan, and antibacterial, safe and secure.
The contents are made of natural plant-based materials and are made in Japan, so you can rest assured.
The surface is also antibacterial.

*There are individual differences in viscosity due to the characteristics of the material, but there is no problem with performance.

Total weight: (approx.) 600g
Size: (approx.) 19.5 x 13.7 x 2.8cm
Main material: [Container] Polyethylene
Contents: Natural plant polymer
How to use
●Please freeze completely before use. (It will not be able to fully utilize its capabilities)
●For an 8-liter cooler box, one freezing pack GT-16℃ Hard (600g) is the standard. However, this depends on the performance of the cooler and how it is used.
●To maintain the cooling time for a longer period, we recommend using it in combination with a regular ice pack.

Handling precautions
●Never use as an ice pack to reduce fever or cool affected areas. Frostbite may occur.
●Do not apply directly to the skin for long periods of time. Frostbite may occur.
●Keep out of reach of children.
●Wipe off any moisture on the main unit before placing in the freezer. (This may affect the freezing time)
●Please read the precautions carefully before use.
●Do not place near fire or heat.
●Be careful not to touch sharp objects or protruding objects.
●If it breaks or leaks, do not use it, although it is safe. If the contents get on your clothes, wipe it off with a wet towel.
●Dispose of it according to the disposal classification of your city or town.

Precautions for use
●When using, be sure to set the freezer to the lowest temperature and freeze until it is completely frozen. Please note that if the temperature inside the freezer does not reach -20℃, it may not freeze. (The contents will become whitish as it freezes)
●If it is difficult to freeze even when the freezer is set to the lowest temperature (below -20℃), make the freezer as empty as possible before freezing. Also, place it as close to the cold air outlet as possible.
●It takes about 36 to 48 hours for it to freeze, but it may take longer depending on the performance and conditions of the freezer. If you stack sub-zero packs, they may not freeze, so never stack them together. Also, do not stack or allow them to come into contact with regular ice packs or food that is not completely frozen.
●If you put them in a cooler with vegetables or other items that you do not want to freeze, wrap the sub-zero packs in newspaper or something similar and keep them at a distance.
●Since this product is made primarily from natural plant-based polymer materials, it has a lifespan over time. The lifespan varies greatly depending on how often you use it and the storage environment, but if you notice a decrease in performance, replace it with a new product.
●Do not use in a soft cooler with aluminum vapor deposition on the inside. Condensed moisture may cause the aluminum vapor deposition to peel off.