Hyper Subzero Cooler S

The Hyper Subzero Cooler is the perfect size for solo use, such as for work or sports, and when used in combination with the Subzero Pack, it provides cooling capacity equivalent to that of a hard cooler. The shell-protected structure protects bottles and other items from external shocks. The metal silver color of the surface reflects sunlight. Unlike hard coolers, which are difficult to store, this product can be folded for compact storage when not in use.

For refrigerant, we recommend "Subzero Pack -16°C" (sold separately). Of course, ordinary refrigerant can be used, but the combination use with "Subzero Pack -16℃" improves the refrigeration effect and ice cream can be stored for up to 9.5 hours. *It is necessary to conform to the conditions described in the explanation section of the comparison experiment. The photo is for illustrative purposes only.

Three cups of the same type of ice cream are sandwiched between two sub-zero packs of -16°C (600g) inside a Hyper Subzero Cooler S at a room temperature of 33°C. The temperature of the ice cream is measured at the edge of the cup (the part that easily melts). The lid of the cooler was securely closed, and the temperature of the rim of the ice cream cups (the part that easily melts) was measured.

It is possible to use "double speed sub-zero pack" instead of "sub-zero pack -16℃". In this case, the preservation time of ice cream will be shorter. The experiment was conducted with the cooler sealed. If the cooler is opened and closed repeatedly during use, the shelf life will be shortened. The storage time will be shortened if the cooler is exposed to direct sunlight. In the experiment, vanilla ice cream in paper cups was used. The shelf life will vary depending on the type of ice cream. If the cups are individually different heights and have different levels, some of them may not touch the -16°C sub-zero pack, resulting in individual differences in preservation time. If you place ice cream on this part of the container, the ice cream will not be stored for a long time. Ice cream will not be kept cold even if it is placed in this part. Ice cream should be placed in the cooler when it is completely frozen.

Image of a cup of ice cream sandwiched between two sub-zero packs of -16°C (600g)

After use, the zipper can be closed for compact storage down to less than 3/1 size.

It has the capacity to hold six 350 ml cans of beer or canned juice and a sub-zero pack.

1) Open the zipper and unfold the shell horizontally. 2) Set the floor foam stored inside firmly on the bottom of the cooler. 3) Be sure to use the cooler with refrigerant as well as items to be cooled. 4) The cooler has a holder to hold a 600g size hard-type sub-zero pack or a general hard-type refrigerant. 5) After use, only the innermost inner cover secured with hook and loop fasteners can be removed for cleaning. 5) After use, only the inner-most inner cover, which is secured with hook-and-loop fasteners, can be removed for cleaning.

1) Raise the floor foam, 2) fold the flap (lid) inward, 3) then fold the left and right walls inward, 4) firmly align the front and rear shells, and 5) slowly close the zipper.

The adoption of a metal silver color that reflects sunlight mitigates internal temperature rises.

With a capacity of 6.5L, the compact size is easy for daily use and recommended for solo camping and sports. It comes with a shoulder belt for easy carrying.

It has a unique shape that allows for compact storage, yet provides high cold retention capacity. In addition, the shell-protected structure protects it from external shocks.