Living on Vancouver Island, I see a lot of rain. No, like a lot. In the winter time, it's not unusual to have a week's run of the wet stuff. As my gig demands that I carry a number of pieces of hardware that don't play well with water. Most of the time, my GORUCK rucksack provides enough water resistance to make me feel like all of my expensive bits and pieces will be get from point A to point B in one piece. But on days when the weather's coming down hard and sideways, I've come to rely on the Arc'teryx Granville Backpack. It's a 20 litre ruck that's made out of N400p-AC² nylon 6 plain weave that repels water like nobody's business. It sports more than enough space to comfortably haul around my laptop, iPad, external battery, camera and the rest of my writing supplies as well as a few groceries without having to jam anything in to make it work.
My only real complaint about the pack is that unless you use it with some third-party packing cubes to keep everything organized, whatever you toss into it will quickly turn into a soup sandwich. While the pack's top flap features a zippered compartment that's perfect for stashing my sunglasses, small first aid kit pens and other sundries in, the Granville's spacious main compartment has no built-in organizational tools or attachment points. Kind of a bummer--but not enough of one that I find the pack to be in anyway unusable. So yeah, if you live in the wet like I do, it's worth giving it your attention.