SuperFoam insulation plus ThermaFlect radiant barrier interior combine to provide superior cooling Ultra Safe leak proof lining with Microban protection helps protect against odors and stains and makes the lining easier to clean Includes 4 total High Performance Ice Walls 2 High Performance Ice Walls included with each lunch pack that fit into 2 exterior Ice Wall pockets to enhance coldkeeping Features 2 padded handles and a removable adjustable shoulder strap Can be carried vertically or horizontally Provides double capacity when expanded Includes a leak proof container set