What Materials Are Used in Cooler Bag Insulation Systems
A cooler bag may look simple from the outside, but its real performance depends on what is hidden between the shell fabric and the inner lining. Two bags can look almost the same in photos, use similar colors, and even have the same size, yet their cold retention can be very different in real use. One may keep drinks cool for only 2 to 3 hours, while another can hold temperature much longer under the same outdoor conditions. The reason usually comes down to the insulation system: the choice of foam, reflective layer, lining material, thickness, sealing method, and overall bag structure.
