Sling Pack

Sling Pack
What would Backpack u choose?

My Sholder left hurts when I take my original bag and I think I need a new backpack this INFACT years I do. I'm thinking maybe I would strap a better than having two and hurt my Left Sholder. Do not want to sound like a nerd with a belt bag, but what u recommend? Honda, Messenger Bag, or let my left Sholder injured and has two straps or other bag that I really need your help!

I would go with a sling.

Tactical Sling Pack