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All this camouflage.
OP, I took pic related to SE Asia for a few months. It's by United London but can't find a model name for the life of me, spent about £20, shits amazing, I sewed a hidden pocket on the back to store small notes that I don't want in my pockets and stuff, and one of the straps at the lower end almost broke, but I've been using it to do carry weigh in excess of 30kg too so you shouldn't have to worry.
I saw idiots in Asia with their huge backpacks packed full of bullshit and laughed.