Anyone else who found their backpack hurts your shoulders and upper back?
I have been complaining for 3 years (only use it when traveling in holiday). DH just couldn't believe me, because he's really happy with his 40L one.
Mine is probably 30l or 35l. I've adjusted it again and again but still never found it any better.
I suspect it's to do with the body shape. I'm quite slim with sloping shoulders which are kind of narrow.