According to his needs, elect always between the options that they be convenient for you, namely:
Lightness and simplicity Multiple pockets
Back with froth and or ventilated Organizational pocket ( for daily use )
Protection against the rain You carry elastics material
The ice axe carries walking canes crampons
All that we need and a little more to have a good trip.
Light backpacks with space for bag of hydration.
Backpacks child carrier with compartment of storage for diapers. In order to initiate the Nomadic children of the house.
To avoid carrying the backpack or the pockets of the pant fully load. A money belt or hidration belt is always a very practical option.