The Evoc Hip Pack Pro Hydration Pack 3L is a high tech, back-free, ventilation optimised carry device for hydration and other essential needs on shorter rides. With enough space for a tube, some tools and a 1,5l hydration system it comes with a very dialled system that is an extra in comfort, that we call ventiflap: increase the back distance for climbing and tighten it to the hip for the downhill, simply by pulling a string! Evoc Hip Pack Pro Hydration Pack 3L Features Hydration bladder 1.5L Airflow contact system offers perfect back ventilation Ventiflap for uphill- and downhill mode adjustment 2 bottle carriers with extra safety fixation - easy to reach