A great backpack recommended by the forces. Very tough for the outdoors and versatile enough to provide what you need on long haul hikes.
The H.A.W.G is more than just a reservoir it has two full length compartments to keep items organised. If quite is what you need when bird watching then the noiseless zipper pulls throughout are the perfect solution. With the 3 litre capacity your have all the water to keep you going.