The Thule Rail Hip Pack is a revolutionary hydration hip pack with the ReTrakt hose system to easily secure drink tube while keeping your eyes on the trail. The Rail comes with a 1.5 litre hydration bladder with a magnetic hose system for ease of use. There are plenty of storage options with dividers and pockets and it has a dedicated key clip and a light attachment loop too.The closest you can get to the capacity and function of a traditional hydration pack whilst keeping your back and shoulders unobstructed4 Litre capacityThe Rail 4 uses a custom 1.5 litre hydration bladder and combines it with Thule's patented ReTrakt magnetic hose management system for a class-leading hydration hip packLinear, flexible magnet on the drinking hose secures it against the pack's waist belt whilst not in useOne-handed, behind-the-back access to your phone in a dedicated soft-lined protective pocketDescend with confidence with excellent stability and breathable materials for all-day comfortElasticated b