Review on Streamlined Running Backpack By FITLY For The Minimalist Athlete by Don Kishore

I really love the minimalist size of this running pack and the fit. I'm small (5'5 and 125lbs) and didn't want a pack that would be overwhelming and big and hot. I wore this on a 2 x 5k runs with one small soft 8 oz bottle of water but when I wore it on a 1/2 marathon with 2 8oz flasks I got some serious chafing even though the pack was on all the tightest settings. Really a shame as I don't need water for a 5K run but really do for longer distances but can't wear this for longer distances if it chafes like this.