Material: Oxford cloth + aluminum foil. Multi-Use: Can be used as a lunch bag for commuting to school or commuting to work or camping. It can be used as lunch bag and daily stuff bag for travel, and can be used as a shopping bagOxford fabric: Made of thick oxford fabric that is durable and long lasting. The waterproof design means you don't have to worry about it getting wet in the rainAluminum Foil Thermal Design: The interior is designed with aluminum foil to keep you warm and cold. In the event that the juice of side dishes is overflowing with carelessness, it can be easily removed by wiping with a damp clothSimple Design: Simple and stylish design: Low profile and simple design that can be used for any season of the year