To avoid dehydration during serious physical exertion, it is vital to constantly replenish fluid loss. To make this process as comfortable as possible and not waste time unfastening and opening flasks and bottles of water, a special hydrator or a drinking system built into the backpack will help you. This hydropack backpack is an indispensable gift for those who love hiking and long bike rides, as well as for those who make new paths into the unknown.