Tortuga is created by Fred Perrotta and Jeremy Michael Cohen. They find that there is no perfect backpack, so they create it. You can bring everything you need in Tortuga without checking a bag.
Minaal is also created by two guys(Dougs & Jimmy) , they want to make travel more easy and productive. It’s clam-shell design let you open like a suitcase to provide you access to the entire pack.
If you want a backpack that can fit in any condition, GORUCK is your choice.It is created from military-grade material and meets carry-on requirements. GO RUCK is much smaller than Tortuga and Minaal, but more expensive and heavier than Tortuga and Minaal.