The exterior of the backpack is made of high-density 1680D Oxford fabric, which is water- and dirt-repellent, durable, and easy to clean. It protects the backpack from scratches or tears. The inner lining is made of EVA and padded with approximately 2 cm thick foam, which has high heat resistance to help keep food fresh or warm. This insulated backpack can be used as a picnic bag, camping backpack, hiking backpack, fishing backpack, barbecue bag, or everyday bag. It is suitable for road trips, beach trips, picnics, and daily excursions, making it a versatile companion for outdoor activities. Specifications: Material: Oxford Weight: 0.6 kg (approx.) Color: Black Size: 47*36*7 cm / 18.5*14.2*3 in Capacity: 30 L (holds up to 16 bottles of 600 ml beer or 48 cans of 255 ml beer) Large capacity: With dimensions of 47 x 38 x 20 cm and a 30-liter capacity, the backpack offers ample space. It features a spacious main compartment with a zip closure for lunch boxes, wine boxes, fruit boxes, and more. Two front pockets provide storage for small items such as headphones and charging cables. Side pockets can hold two wine bottles. Well-thought-out design: A bottle opener is attached to the shoulder strap, providing convenience during outdoor use. Temperature retention: The backpack features an insulated PEVA inner lining and an intermediate layer of nearly 3 cm thick foam, along with a waterproof outer material, helping to maintain the temperature of food and drinks for extended periods. High-quality materials: Made of durable 600D Oxford fabric with reinforced zippers for added durability. The construction includes multiple layers to support temperature retention. The inner lining is made of PEVA and a thick, waterproof insulating foam layer designed to keep contents cool and fresh. Waterproof and leak-proof: The secure, leak-proof inner lining helps protect against bacteria, odors, and stains. The durable lining and waterproof zipper allow safe storage of ice, canned beverages, and soft drinks. Versatility and comfort: The backpack features adjustable, padded shoulder straps and carrying handles for comfortable, hands-free transport. Ideal for travel, work, or outdoor events, it is convenient for use at the beach, on hikes, or during road trips. Waterproof and durable: The exterior is made of durable Oxford fabric that is water- and dirt-repellent and provides protection against scratches and tears. Versatile use: Suitable for picnics, camping, hiking, and everyday use. Offers practical storage space for a variety of outdoor activities. Large capacity: 30-liter volume provides ample room for food, drinks, and accessories. Side pockets are ideal for storing bottles. Temperature retention: PEVA insulation and thick foam help keep food and drinks hot or cold for hours. Comfortable and portable: Padded, adjustable shoulder straps and sturdy carrying handles ensure comfort during travel, hiking, or day trips to the beach.