The backpack Vaude Gravit 25 + 5 corresponds to 100% of my presentation should be like a backpack. He has a good back respiratory system that prevents the sweating. He is sufficiently rigid support to optimally around the back and promises due to its timing belt a perfect Sits. Through its numerous pocket compartments (total of 3 with organization subjects) it is great for the everyday university life, cycling and trekking.
Personally, I have now found the backpack no counterpoint for about 3 months and have so far.