Anyhoo, I tried fitting Mark's old hydrapak, and it feels just small enough for my back. So I'll take this to Badian and test this. Hopefully, it works so I don't need to get Nathan intensity (i think 'intensity' is the model for girls) yet. I find the Nathan a tad boring. I want to have more time finding my perfect mate hydration backpack because I don't want to be buying more. :)

