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SPECS
Feel the difference! The Polar Bear Coolers utilizes Dura-Temp liner air trap technology. This allows our coolers extremely good resistance to low temperatures, elevated temperatures and exposure to chemicals. The Polar bear coolers have an R value of 8.75. Our product is high temperature flexible to 200 degrees Fahrenheit and crack resistant to minus 40 degrees Fahrenheit.
The Polar Bear Cooler will not leak or sweat.
The outer shell is comprised of 1000 denier cordura nylon. This is the good stuff. This superior performance nylon has outstanding wear durability, Exceptional resistance to abrasions, punctures and tears. The Polar Bear Cooler will not mold or mildew and is washable in soap and water.
All attachments and exterior hardware are top quality. The Polar Bear coolers also feather a # 8 heavy duty weatherizes rubber-coated zipper for maximum resistants to elements.
The Polar Bear Coolers work well with regular ice, blue ice, frozen bottles of water, boiling water and crock-pots up to 200 degrees. We stand behind our product with a one-year warranty against manufacturer defects. We are confident you will enjoy years of performance from your Polar Bear.
R Value, 8.75 a commercial unit used to measure the effectiveness of thermal insulation. A thermal insulator is a material, manufactured in sheets, that resists conducting heat energy. Its thermal conductance is measured, in traditional units, in Btu's of energy conducted times inches of thickness per hour of time per square foot of area per Fahrenheit degree of temperature difference between the two sides of the material. The R value of the insulator is defined to be 1 divided by the thermal conductance per inch. This means R is an abbreviation for the complex unit combination hr⋅ft2⋅°F/Btu. In SI units, an R value of 1 equals 0.17611 square meter kelvins per watt (m2⋅K/W). In clothing insulation units this is about 1.136 clo or 1.7611 tog.
British thermal unit (Btu or BTU) a unit of heat energy defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. In America the British thermal unit is sometimes called the heat unit. In defining the Btu, it is necessary to specify the temperature of the water; thus there have been several definitions over the years. However, one Btu is equal to about 251.996 (small) calories, or 0.251 996 of the (kilo-)calories counted by dieters. Using the current definition of the calorie (the IT calorie), one Btu equals approximately 778.169 foot pounds, 1.055 056 kilojoules or 0.293 071 watt hour. The symbol BThU has also been used, especially in Britain.
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