Crafted with exceptional quality inside and out, the 12 Pack is built for everyday use. The Polar Bear Nylon Series features a heavy-duty 1000-Denier Nylon outer shell, making the cooler lightweight and easily maneuverable. While this cooler looks great on the outside, it's what's on the inside that really counts. The Polar Bear houses 1-inch thick high density foam, giving it the most cold chill impact in it's class. It's going to keep you cool even on the hottest days.