PEAGLOB Large Capacity Backpack with Cooler Compartment The insulation layer is designed specifically for picnic enthusiasts, and the special aluminum lining keeps food warm or cold for a long time. The shoulder strap adopts an S-shaped design and adjustable shoulder strap, which conforms to ergonomics; The breathable mesh material will not make you feel tired; Enjoy traveling easily. High quality polyester fiber and nylon fabric ensure that the backpack is waterproof and wear-resistant, and can be used for a long time. We always adhere to the concept of Simple and Enjoyable travel, and insist on bringing high-quality backpacks to customers!!!!