Unlike the soft-sided coolers you’ll find on the shelves of the big box stores, the Engel Cooler BackPack is engineered to withstand harsh use on land or sea. It features a rugged, tear-resistant 500-denier polyester diamond ripstop outer shell with a waterproof TPE coating for easy cleaning. On the inside, there are 2 radiant barrier liners of reflective foil – another exclusive Engel feature you won’t find on other bags. Sandwiched in-between is a 1 inch thick layer of closed-cell foam insulation.
While the insulation effectively minimizes heat transfer to maintain cold inner temperatures, the radiant barrier liners reflects the sun’s long-wave heat radiation to further enhance the Engel Cooler BackPack’s cold-keeping capabilities. Under typical conditions, the Engel Cooler BackPack will hold ice for up to three days.