SuperFoam insulation plus Therma-Flect 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 cold-keeping 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