It's hard for me to believe that other reviewers didn't point this out.
Clearly the designers attached the upper ends of the straps too far apart. So they added these longggg tails which they call "molded thumb-looped strap adjusters'. People with narrow to normal shoulders will have to use the adjusters to pull the backpack up to their necks or the straps will slip off their shoulders.

Still i wanted to keep it as mini backpacks are hard to find. I tried it on with a delicate summer top and no way! No matter how high up i wore it, the straps were slipping off and in two minutes of walking around the house were already irritating my shoulders. Plus those crazy strap adjusters were wagging around my hips. Next I tried adding weight to the backpack, but it help only marginally.

I wanted this pack to wear around the city...with casual to business attire. This is a very heavy duty (well made), stiff, and sporty backpack which is inappropriate for anything but very sporty clothes.
I'm not a tiny, wisp of a girl. i'm 5'3" 125 pounds. I waited a couple of weeks for this to arrive and really needed it for a trip. Now I'm kind of screwed, but back it goes.

While i have your attention: it seems absolutely insane that you have to pay megabucks to get a backpack that prevents thieves on crowded buses or subways from having easily access to your valuables. why oh why isn't this strap zipper compartment accessed from the underside? Why aren't all zippers against one's back. Designers are so 'uninventive' that we are asked to carry our BACKpacks on our chests(especially difficult for women) in order to prevent access.