Lightweight and easy to carry, it is an ideal choice for offices, schools, picnics, gyms and outdoor activities. Heavy duty zipper Smooth zipper, high quality material, sturdy and durable. Aluminum foil liner Oil and dirt resistant, easy to clean. Waterproof Oxford cloth Oxford cloth exterior design, waterproof and durable. Front pocket design The front pocket is designed to hold small items such as paper towels, tableware and cell phones. Three-tier design, longer heat preservation Lunch bag is simple in appearance and medium capacity, suitable for most office workers and students. It can keep warm, cold and cool. You can place a lunch box, fruit, milk, etc. at the same time to meet your energy needs. Insulated bags can keep your food delicious and improve dining satisfaction.