The Riv products I have bought and used this past year are the shopping bags, and the tool roll up.
The tool roll up is exactly the same. It is as durable as anything you will buy, the big reflective stripe is a plus and there is nothing like being able to find any tool as soon as you open it.
The brown color looks great with Brooks or VO brown saddles
and it can be used without the bike as a great overnight bag.
I simply tie a strap through the top holes to use as a handle and an throw it in the car when I need a bag. There are also brass loops on each end for a shoulder strap if you want to add that.
On longer trips I have used one of the Riv shopping bags for extra clothes and have eliminated other luggage. The combination holds a ton of clothing and will stand up against any baggage handler on the planet.
The other great bag I started using was the Frost River Medium Manitou. Named after a beautiful island in Lake Michigan, the bag is just as beautiful and it stays that way. This bag looks great,
it has room all over it, more than I can use. It holds files, paper, presentations cell phone, tablet computer, nasal spray, glasses, writing instruments (how quaint, "writing instruments") and other urban survival gear--lunch.
The shoulder strap is long enough to wear it messenger style across the shoulder, it fits perfectly on my porteur rack, but the best thing about the Manitou is that all the spilled coffee from Byron's cup holder and my clumsiness just wipes off and has never left a mark.
Finally, that is a great thing about waxed cotton in general. It's tough and continues to look good despite the abuse it can receive on the road. Both Riv and Frost River make bags that are heirloom quality. Invest in them and hope one of the grand kids likes old stuff 'cause they're gonna get them.