Our Wholesale Medical Cooler offers exceptional quality within the Camping Insulated Bag category.Yes, insulated bags work by slowing heat transfer with thermal foam and reflective liners, keeping cold items cool and hot food warm longer than regular bags. Under typical conditions they can maintain cold for about 2–8 hours without ice packs and up to 12–24 hours or more with good ice and packing technique, though actual performance depends on insulation quality, outside temperature, and how often you open the bag.