Jacob Badacob Christensen

i have had this for about a month now and normally i just have training shoes and a water bottle in my backpack but yesterday went shopping and it absolutely helps. how ever if you have a big backpack with multiple ways of customizing the straps to your body type then i don't think it will do anything. Pros: it feels way better on your shoulders. Cons: it is a bit tricky to but on if you have a...