1. Encrypted waterproof Oxford cloth fabric is easy to clean, waterproof and durable2. Adopt environmental protection and waterproof EVA, closed environmental protection temperature, waterproof and moisture-proof3. Portable bottle opener for picnic, no longer use your mouth to open beer, you can open drinks without chopsticks4. Built-in multi-pocket hooded mesh bag, satisfying your travel, no more crazy looking for things5. Elastic shrinkable rope, convenient to put large and small items6. Lightweight and durable: made of leak-proof durable fabric, the best lightweight backpack with cooler, suitable for picnics, road/beach trips, hiking, camping, fishing, cycling, hunting, is a perfect gift for men and women.7. Multifunctional: The stylish design of our heat-insulating and cooling backpack makes it also usable as a lunch backpack or daily backpack. Perfect for lunch, picnic, work or travel.8. Size: 29x20.5x39cm and 31x21x43cm are available in two sizes