I am not sure, if it maybe wont be a little too small for your needs, its rather a daypack or escape pack, but I fell in love with the TT Mission Pack
for it is very comfortable to carry and still fits alot of stuff, certainly more that the usual daypack. I have a 60l genuine Bundeswehr backpack, but since I got this little beast, I use it for traveling most of the time. And if I need more space, I simply attach one or two (or three if you like) molle bag modules to it.
It can be made very compact by the usual side strapping system, but also can fit a lot of stuff in it, if you need it to. Two sections, several seperate inbags so securely transport stuff, f.ex like a notebook or other tech, but also zipable parts for finer gear and documents to be kept from getting wet or lost.
It has an outer section for bulky stuff, easily fits a MICH (or Schuberth in my case
) and molle straps on the back and on the sides. Also the robust carrying handles on the sides are very convenient, f.ex if you need to pull the pack out of a pile of packs of a cargo load fast, without ripping the pack or crippling your fingers. And the carrying handle on the top is very comfortable, being very durable, yet soft, covered with thick, durable rubber. That makes the bag nice to carry in one hand, even if its overpacked. Last but not least, the back of the pack is almost as comfortable as a sports car seat, its very richly padded, with the pads being located on both sides of your spine, without applying pressure on it, so that it is nice to carry over long times even with heavy load. Also it has a rain protective overback in the bottom zip, which is strapped to the bag and has a rubber ring to fixate it around the pack.
Its made of Cordura 700 DEN, the overall quality of this product did really convince me. What I liked most is that almost all the inner surfaces, as well as the zipping lines are rubberized. I got myself a rare older version Gen. 1 of it in Flecktarn, but its easily available in olive, black or tan in the newer generations.
meas (unloaded) 55 x 28 x 20 cm
Dont let the low load volume fool you, a lot of stuff goes in there.
Here is a link to a german review, the photos are self explanatory though: http://spikesgearcheck.blogspot.ru/2012 ... .html#more