I have a US 20, I've also had in the past the R35 rucksack and even after lots of use they still look like new - I thin it was Diaccord who purchased the R35 off me, and to my knowledge it's still going strong. Very well made kit is Kriega.

One great point about the USx stuff is it all interconnects, so you can use a US20 as a tailpack, then clip a US to each side, or one to the top, or one to the side and a fuel can (I have a GULG-o-tech webbing harness for the 5l fuel can) to the other. With the Tank harness you can then have many combinations of tankbag too. It's very very flexible.

I'll be using my US20 as a tail pack for Portugal in a couple of weeks and I can get all my clothes for a couple of weeks in there and use the US10 for carry the electronic gizmo's.

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Never underestimate the power of stupid people in large groups.