The Oxford Aqua B-25 Hydro Backpack is a waterproof backpack with a capacity of 25 liters, designed for outdoor activities and daily commuting. This unisex backpack features a waterproof roll-top closure system with adjustable straps that create a secure seal against moisture, making it suitable for cycling, hiking, or urban use in various weather conditions. The molded ergonomic carrying handle with a soft surface allows for comfortable hand carrying, while the large external back pocket is specifically designed to accommodate hydration systems for easy access to water during physical activities. Made from durable waterproof materials, this backpack retains its protective properties while providing practical storage solutions. The black-gray-fluorescent yellow color combination ensures good visibility in low light conditions while maintaining a professional appearance. With dimensions optimized for 25 liters of storage volume, this backpack combines a compact shape with functional volume, making it versatile for both leisure and practical applications. The roll-top design allows for flexible capacity adjustment based on contents, while the external hydration pocket keeps water reservoirs easily accessible without disrupting the organization of the interior. This model is the successor to earlier Oxford backpack designs, featuring improved waterproof sealing and enhanced carrying comfort functions.