Cool Backpack PEVA Waterproof Insulated Thermal Insulation Backpack Thermal Insulation Bag 28L Airtight Outdoor Picnic Bag Beach Trips Hiking Characteristic: 1. 1. Encrypted waterproof oxford fabric, easy to clean, waterproof and durable. The fully waterproof interior uses environmentally friendly waterproof EVA foam, closed loop insulation, waterproof and moisture-resistant, three-layer temperature lock, warm in winter and cool in summer. 2. 2. Capacity is 28 liters. The backpack is large enough to hold the most important things your family needs for a picnic, while not being cumbersome. 3. 3. Multiple pockets to prevent all items in one bag. 4. 4. The insulation consists of four layers, four are waterproof insulation, EVA layer, polyester layer and PVC coating on the sides of the fabric. The multi-layer waterproof layer ensures that water does not get on the body or car. 5. 5. A fashion view, functional rooms, this stylish backpack is perfect for dining outdoors. Specification: Material: Oxford Size: about 31*21*43 cm Color: 6 colors available List of packages: 1 * insulated cooler backpack