I use a Think Tank Retrospective 10 . It is made of heavy canvas material. I carry a 7D with Grip with a 40mm Pancake on it. I carry a 17-55 2.8 EF-S and an iPad. The bag is wide enough to fit the camera and i still have space. It comes with a rain cover so i don't worry about getting caught in the rain. It is conspicuous. In NYC that is always a good thing.