The Camelbak Octane XCT Hydration running backpack is a highly practical & ultra-lightweight choice that will keep you prepared & primed for all your outdoor activities. There is a 3 litre reservoir for your drinking fluids & a pocket at the front with a single vertical zip to store any essentials such as extra layers, weather protection, trail maps & energy bars. There are handy stash pockets on the waist belt & harness area & the sports rucksack comes with a whistle & front & back reflectivity for your safety. Keep it comfortable on your back with the adjustable straps & drink through the Pure Flow tube which is easy to clean & has a wide mouth opening.