The Construction of YETI Tundra coolers is carried to the extreme, because there are elite groups of outdoorsmen and adventurers who seek extremes. Desert sun has scorched these coolers. Blizzards have frozen them. Bears have gnawed on them. They have tumbled off trucks and cliffs. All the while, Tundra coolers have kept their cool. This is one ice chest that puts no conditions on reliability under the harshest conditions.