Ok, since I suspect you're referring to camera bags (otherwise this post will be OT, and pardon my interruption), let me put my suggestion forward for the world's best camera bag. I have ditched my Domke F-5XB canvas bag for a new Courierware extra small camera bag in cordura nylon. The material is amazing, the bag is soft and settles against your hip/lower back perfectly and holds an M body with 50 cron with room for at least two other lenses and plenty of other stuff. It is the perfect bag (for me). The Domke ended up being a tad too small and a bit like lugging a square brick against one's side. Canvas is supposed to be more supple, but, with the padding in the Domke and the reinforced corners and edges, this bag is not.
Anyway, if anyone wants to take a sand-coloured F-5XB off of my hands, drop me a line. I know this bag has many fans. I'm just not one of them.
Oh, and, in case it's not obvious, my vote is for Cordura ("other").
Ron