Developed for running, the GATO Sports Hydro pack 1.5 liter is specially designed for runners. The reservoir, which is included, has a capacity of 1,5 liters, but if you want to carry more, place a GATO Sports Soft flask in one of the specially designed soft flask pockets on the front. Like this you can take an extra liter of water with you. Place more equipments on the elastic net, take gels, bars, cards, trash and your phone in one of the other storage compartments. In case of emergency, warn others with the specially designed whistle clip.