(Edit February 16, 2018)

This is my 'Ruggard Thunderhead 15' travel backpack for my Sony a7RII system.

The red-outlined inserts are stock promotional shots. The upper right insert shows the exterior of the backpack while the lower right depicts the small velcroed partitions that are provided from the factory.

My Ruggard 15 has the FE50, FE16-35ZA, FE70-300G, FE24-105G lenses plus the ‘Samyang’ 14mm as well as a variety of travel accessories. It also has (just) room enough for my small Microsoft Surface 3 and my travel docs/meds on a plane.
A 3rd battery and case exists under the tiny FE50. I have had no problem carrying and stowing this onto airlines AND THAT INCLUDES the small puddle-jumpers that often want us to stow carry-ons.
Even compared to my everyday backpack in the previous image this is still compact at roughly 8.5” thick x10.5” x 12.5”. (22cm x 27cm x 32cm)
Travel ready, it's 15.6 lbs and 13.4 lbs when in unpacked normal use which is significantly heavier than my 8.5 lb daily backpack.