Cold-weather SBS is a seasonal disorder which begins the moment the student puts on a backpack in winter, and persists throughout much of the day, causing embarrasment, discomfort, and laundry stains. The condition is exacerbated in cold weather, especially when students wear warm clothing.

Also known as "Sweaty Back Syndrome," the condition is caused by exceptional mass being placed over the main heat-reducing organ of the body. Warm-weather SBS is a standard condition, and not a disorder. Cold-weather SBS however is a health concern, as it can lead to hypothermia. (or not...)

The Jackpack is a specialty garment, an insulated jacket-like object, with a large storage pocket in the rear... or a zip-up backpack with insulated sleeves, if you prefer to think of it that way. Our pattented insulated sleeves keep students warm as they march between classes, but once in class, where the conveniences of modern heating provide relief from cold weather, the student may remove their insulation along with their books.

The Jackpack also solves various other problems, such as loosing a backpack or a jacket. Now both are conveniently attached together, ready to be lost together.