Purpose designed GHB

[Steve]

I have a Cordura satchel, originally made for electronic equipment, with a simple Velcro flap top. It has a wide adjustable strap, and sits nicely just behind my hip. I recommend this type of bag, it can be accessed or taken off very quickly at any time, so if you wanted to carry something defensive or valuable that you might need to either deploy or hide in a hurry this is great.

It doesn't replace a backpack, but is a useful addition.