Back Camel 15L Water Bladder Hydration Backpack Pack Outdoor 。The image shows a CamelBak M.U.L.E. hydration backpack, designed for carrying water and gear during activities like hiking or cycling. Key features include: Hydration System: It holds a water reservoir, allowing hands-free drinking via a hose and bite valve. Storage: It has multiple compartments for organizing essentials, including a main compartment and smaller pockets. Comfort: Padded straps and an adjustable fit ensure comfort during use. Durability: Made from robust materials, it\'s built to withstand outdoor conditions. Capacity: The M.U.L.E. can carry up to 3 liters of water, with additional space for gear.