I've got a Novara Commuter backpack from REI, and I'm very happy with it. It has a lot of pockets and compartments for organizing various things and keeping clean and messy stuff separate. It has chest and waist straps for stability. It has raised, padded ridges on the back of the pack that I would guess are supposed to create a ventilation channel. (I haven't used it in warm weather yet, so it's hard to say how well that works.) It has a rain cover that tucks away neatly into its own pocket at the bottom. It's very comfortable. It's bright yellow, but not hi-vis.