I recently bought the Nest backpack and the smart cube with it. I brought it with me during my summer holiday (I am in the middle of layovers as I write this review). I honestly thought that the backpack repels water but I found the my laptop got wet inside the bag. I placed a water bottle inside the folding pocket at thr bottom of the bag. I guess the pressure inside the plane spilled the water a little bit... I placed it there because it can't fit in the sife pocket where I am supposed to be able to fit a small sized water bottle. I wasn't also able to fit the packing cube in front of the bag that I had a hard time closing the clam shell zippers. So i ended up leaving the smart cube at home. The should straps seem stribg but they're really warm. There isn't any air flow in the straps . Overalll, the other features are quite good. I like that there are lots of pockets. but I am just worried about the laptop. If my laptop got wet inside, how sure am i that i can I won't have any problems with rain?