Bought this backpack specifically to use when i need to transport large items on my motorcycle and occasionally store my motorcycle gear (ie: helmet, jacket, etc). The bag lives up to expectations and then some. The main pocket is very spacious, enough to hold a helmet and leave you some extra room for other stuff. The build is very solid and it looks pretty sweet. I recently used it to travel to Las Vegas for a weekend and was quite impressed at how much clothing (including shoes) i was able to put in there. The design of the strap make the bag feel comfortable and light on the shoulders.