black zip clasp black leather backpack Zipper | Laptop Backpack toned zips and hardware add to its refined aesthetic Colins Keirs Black Leather Backpack

Yes both sizes are aircraft cabin compliant WEIGHT: PHOTOHIKER 24 (without PHOTOCUBE): 2.6 lbs | 1,200 g PHOTOHIKER 44 (without PHOTOCUBE): 3.7 lbs | 1,700 g PHOTOCUBE M: 0.9 lbs | 400 g PHOTOCUBE XL: 2 lbs | 900 g ACCESSORIES: Internal PHOTOCUBES PRICE: Starting at $353 for the PHOTOHIKER 24 and $70 for PHOTOCUBE M Video: PHOTOHIKER on Kickstarter What Makes PHOTOHIKER Unique

If your camera loadout is simply too massive for your personal luggage, you can splurge on something like the bombproof 1615 Air Case from Pelican to check sensitive gear but this gets pricey fast

Could I add additional storage space or expand the bags capacity

This, combined with the fact that any gym bag features multiple compartments, means that the bag itself can be repurposed for any number of things