Doctor’s Bag hinged openings have always been my go-to type of travel bags because you can see ALL of the contents - but now that we carry iPads, laptops etc those bags are hard to find - until now! Holy cow this thing is awesome! Tons of pockets, an interior pocket for an external battery with an outside port, so much room and HUGE water bottle/umbrella side pockets - it fits in my duffle (carry on hard body roller bag + carry on personal item duffle) and is great to grab just this one thing from my duffle to throw under the seat on a flight - and everything is visible and it stays open! Glory Hallelujah!! Thank you!! A couple of weeks ago as I was boarding a flight, two women ahead of me had the same backpacks! We talked about how much we loved them and how we felt “in the know” because these bags are so popular with flight attendants :0) What could make me buy another one of these bags before this one wears out? Big high quality black plastic zippers - would be a very cool elevated look and it would be super sturdy - AND a quilted nylon exterior fabric could be quite cool as well! Great bag for plane travel AND car travel - perfect all around!