Cooler Backpack 18L Insulated Picnic Backpack Large Waterproof Cool Bag Backpack Insulated Backpack: The insulated backpack is made of high-density, thick, wear-resistant insulation material inside, and high-density Oxford cloth outside. The middle layer uses 5mm thick pearl cotton to extend the heat preservation/cold preservation time and keep fresh for up to 24 hours. The interior uses PEVA insulation material and a unique sealing design to prevent water leakage. Good insulation performance, waterproof and durable. Multiple Pockets: The insulated waterproof cooler backpack has a large pocket for lunch boxes, cans and various snacks and ice cubes, two side mesh pockets for bottled drinks, and a front zipper pocket for keys, mobile phones and other small items. Multiple pockets can meet the storage needs of various items. Large Capacity: The cool bag backpack measures 29x19x42cm, you can easily carry 20 cans of 330ml beer, 4 bottles of 500ml cola, drinks, snacks, towels and picnic mats, etc. Easy to clean, just empty everything, drain and dry thoroughly with a towel. Comfortable and Portable: The insulated lunch bag has a large capacity and a light weight. Adjustable shoulder straps and ergonomic design, padded mesh shoulder straps and back provide comfort and good ventilation when carrying many items. Versatile Cooler Bag: The cooler bag is perfect for picnics, camping, barbecue, beach, fishing, hiking, lunch, work or travel and other outdoor activities. It can accommodate meals, beer, snacks, fruits, high-concentration drinks, towels and other daily necessities.