The North Face Interval 30 Backpack - 1830cu in - 2009 BCS

I bought this bag last summer just before i went to China traveling for a month, the vented back was good however it was so humid out there i think i was going to sweat no matter what. I did get caught in some of China's monsoon weather and i was very pleased to say it kept my passport (which i slipped down the bottom of the hydration bladder pocket) nice and dry and also all my things in the main section too. the only down side, and in my opinion is quite a big one for travelers out there, the front zipper pocket is good for putting things like cameras etc in so you can grab them easily when you want to take a picture, however, it also means that pick pockets can also get in pretty quick (i didn't get anything stolen because i kept my valuables the main section and in the hydration bladder pocket.

having said all of that, this bag is extremely comfortable and due to the mesh back, you can put all awkward shaped things in you bag and it will keep it from digging into your back.
I would definitely recommend this bag to anyone, but just a warning to keep you valuables in the main compartment!

I got this pack to replace my 3 year old kelty that had done well but was a bit on the small side fit wise and starting to cause some major lower lumbar pain. I tried this on at the store first to test the fit before I bought it here. It fits perfectly (I'm 5'11") and the trampoline back breaths and feels great. I tried it out on a 9 mile hike up Mt. Elbert and it fit all my rain gear, lunch, and water and I still had room for all the layers I shed on the hike. It also works great for my bike ride to work.