Look at fstopgear, lighter than thinktank, more verisitile.
I use Akona Mesh Boat Duffel which I got from Dipndive. It is 29" X 15" X 9" and very convenient for many purposes. It is also very ragged and durable. Check it out!
No padding no filling
Why should I use this duffel bag for my photo gear? And How?