When it comes to choosing a backpack there are number of things that you should be looking at.  .  It is important that you look at the kinds of trips you will be intending to use it for, including how long these trips are going to be, plus you will also need to look at the type of gear that you will be carrying within it.

As well as looking at the above when it comes to choosing your backing you should decide whether you want a lightweight, minimalist or ultra light one such as the Osprey Atmos 65 or you could in fact go for a deluxe version.

1.  Extended Trips

The type of backpack you should be considering if going on a trip that is more than 5 days long should be one that is able to hold over 70 liters of equipment.  One such pack that fits into this category perfectly is the Atmos 65 from Osprey.

2.  Multiday Trips

When it comes to choosing a backpack for trips that are going to last between 2 and 4 days then you need to choose a pack that can carry between 40 and 70 liters of equipment.