18L insulated picnic cooler backpack, large capacity waterproof thermal lunch bag (black). Cooler bags are perfect for everyday picnics, for providing food for children, keeping food/drinks warm/cold, potlucks, outdoor activities, etc. Technical specifications: Color: Black; Material: Oxford cloth + PEVA; Capacity: 18L; Item size: 420 * 290 * 190 mm / 16.5 * 11.4 * 7.5 inches; Package size: 450 * 300 * 100 mm / 17.7 * 11.8 * 3.9 inches; Package weight: 540 g / 1.2 lbs. Large capacity and multifunctional pockets: The insulated bag has a wide opening for easy loading and unloading. There are two mesh side pockets for storing drinks, bottles, and umbrellas. A pocket on the lid holds napkins and a deep front pocket is perfect for treats, keys, and other small items. It maintains temperature. The picnic bag has a good seal. It has water resistance, moisture resistance, and thermal insulation. Thanks to the clever use of the thermal camping backpack, food and drinks can be kept dry. Keeps food cool or warm for 4 to 7 hours. Premium materials: This insulated picnic backpack is made of high-density Oxford fabric, with a high-quality PEVA lining, fine stitching, good insulation performance, and is waterproof and durable, making it suitable for outdoor use. Features: Large capacity of 18 liters: This insulated backpack is designed with a variety of internal and external pockets to meet various storage needs.