Capacity & Measurement: Medium cooler backpack size: L12.6 x W8.3 x H16.1 inches,capacity: 40 cans (330ml) ; Small backpack coolers size:L11.8x W7.3x H14.4 inches,capacity: 30 cans (330ml) Superior Insulation Performance: The insulated backpack cooler is made with high-efficiency insulation materials to keep drinks and food cold for extended periods, the small backpack cooler is perfect for outdoor activities, camping picnics, and travel. Lightweight Design & Waterproof Reliable:The soft cooler bag is of lightweight construction and dual-shoulder backpack design ensure comfortable carrying, reducing strain during long hikes. Multiple Functions: This insulated backpack cooler also can be used as a lunch bag, perfect for lunches, picnics, work, or outdoor activities.The backpack cooler for men equipped with 1 main roomy storage compartment, 2 side mesh pockets, 1 large front zipper pockets,for organized storage of food, drinks, ice packs, and other outdoor essentials, catering to various needs. Stylish Appearance: This beach essentials is of modern design with multiple color options, making the fishing backpack with cooler not only practical but also a fashionable outdoor accessory.