210D polyester drawstring backpack which is also a handy cooler bag with an internal layer of thick PE foam insulation that is encased in a waterproof PEVA inner liner. It is ideal for keeping food and beverages cool on the way to work, school or events. The drawstring cooler is also perfect for all sports and swimming gear as the waterproof lining prevents wet gear from soaking through the bag. It also has braided loops at the base for added strength.