[Premium Materials] The backpack cooler is made of high density waterproof Oxford fabric. High-density, water-resistant and dirt-proof. [Thermal Insulation] The inner insulation thicken EPE foam and leakproof PEVA liner of the cooler backpack work together to keep things cold or hot for hours and make sure anti-leaking. [Multiple Pockets] The bag features a wide opening for easy loading and unloading. There are 2 side mesh pockets for storing drinks, bottles and even umbrellas. The bag also has a front zipper pocket for holding napkins and a deep front pocket for putting candy, keys, and other small items. [Large capacity] The cooler bag has a capacity of 18 L, which is large enough to hold fruit, lunch and beverages. [Multifunction] It is convenient for a variety of applications, whether you're catering to an outdoor picnic for your family, planning lunch and snacks for your children, or packing cold drinks for outdoor activities.