Perry Mackin's Charlie Kids School Backpack has been featured in BuzzFeed's "50 Of The Best Last-Minute Holiday Gifts To Get Your Kids".
Perry Mackin sells a water-resistant backpack in a variety of colors. They have a messenger bag look, but feature two backpack straps.
https://www.buzzfeed.com/kristatorres/we-2-moms-made-an-age-by-age-gift-guide-after-do