My (slightly edited) post from a while back:

Search for a company called Wisport They started in the 80's making tourist stuff, nowadays, they focus on military/survival packs. Pretty much all military designs have been developed together with Special Forces operators and they're the main customers.

They're not the prettiest designs, but that's not their purpose. They need to last and maintain functionality in any conditions. You can run them over with a tank, throw them off a building, whatever... they just keep on going. I've got 5 of their packs at home. The oldest one is more than 20 years old and my son still likes to use it for school, 2 other ones are about 15 years old and we use them for day trips, and 2 quite new are used as school/laptop bags.

Since my original post they started doing more civilian packbacks. Same materials, same quality, less MOLLE tapes, brighter colors.