The Arc\'teryx Aerios 10 is perfect for trail running or light-and-fast day hikes. A lightweight and trim fitting pack, it is designed to haul a hydration bladder, food, and compact outerwear. It also features Arc\'teryx\'s AeroForm backpanel for maximum airflow and comfort, a modular bungee system for compression or cargo hauling expandability, and a modular waist belt that can be positioned higher on the abdomen for superior bounce control when running.One Size:0.42 kg / 15 oz10 L**Please note: Additional images shown for detail - actual colour of pack is red