Who goes hiking, or on the mountain necessarily sweats more than usual. I got my previous backpack felt every belonging that my back was always wet, which is unpleasant in the long run. So I was looking for something better. At Amazon, there is always something, I thought, looking. Looking at the equipment, technology and client reports to, you get stuck in inevitable mammoth. Not cheap, but then confirmed in the application. This backpack is top notch - realized that I so still Transpiriere ... come but almost dry at your destination. Furthermore, the volume indication is absolutely right, I even believe that more reinpasst. Also on the processing MAMMOTH is beyond everything. About the color can discuss it - I find you great and absolutely no longer belong to the young audience! I would buy again !!!