High quality material: The exterior of the bag is made of 600D waterproof Oxford fabric, which is durable and waterproof. The liner is made of high quality aluminum foil and filled with EPE foam. 100% waterproof and thermal insulation.Large capacity: The maximum capacity of the bag is 30L. The total size is 31.5*28*20cm, big enough for the whole family's picnic essentials and small enough not to be bulky.Easy to use: the bag has a wide opening for easy loading and unloading. There are 2 side mesh pockets to store drinks, bottles and even umbrellas. The bag also has a deep front pocket for storing candies, towels, keys and other small things.Portability: Designed with padded handles and removable shoulder straps, it offers 3 modes of transport: a shoulder, a crossbody bag, a handbag and easy to carry. It can also be folded flat to save space.Wide Application: Perfect for work lunches, school, offices, picnic parks, travel, camps , barbecues, sporting events on the beach and outdoors, as well as mom's bags.