Until I needed the backpack for professional purposes, I chose it exclusively on price policy and quality. After all, there were never any instructions to use it. But on simplycarry.com/what-are-the-loops-on-my-backpack-straps-for/ I found information that turned my perception and knowledge of this accessory upside down. I bet 80% of people who use a backpack, do not know about its functionality and advantages. At least for myself, I've discovered this thing in new ways.