We have spent the past five years riding motorcycles around the United States. We travel full-time in an RV and have our supplies here. But when you head out on the five or six hour rides we do, not everything is available to you. We also enjoy weekend rides so the more you can compactly pack, the better.
We recently had Viking Bags send us their Voyage Large Motorcycle Backpack. We were very surprised by how many storage areas and pocket the backpack had. If you travel a lot by motorcycle, you know it is extremely helpful to we able to organize. The last thing you want to do is stand in the heat, rain or by the side of the road trying to find an important tool or change gear.
The bag is stout and a little heavy for a backpack. That isn't an issue carrying it on the bike. It feels sturdy and will stay in place. I wouldn't carry it long distances slung on one's back but from the bike to a campsite or hotel room and back is not a big deal. It is well made and will easily stand up to the weather. I just rode from freezing cold to rain and back to 65 degrees. We know our bike bags have to survive a lot.