This Cooler Bag is a thermal bag, waterproof and moisture-proof. Lining with aluminum foil cannot just keep food warm and fresh, but easy to clean and has strong thermal insulation, and the inner mesh pocket design is ideal for storing small things. Ynot only provides you with plenty of space to pack all of your food and snacks you need whole day, as well as pack your keys, cards, phone chargers, napkins, water bottles, utensils, gum or other small stuffs you daily needs.