GR2 is a suitcase on your back. Pack everything you need and it still fits in the overhead compartment.
The Original Go-Bag
My “go-bag” in Iraq was more the size of a GR2 and was big, heavy, and full of lots of stuff I would need if our vehicle got disabled and we needed to fight for our lives. When I was back home in America, “go-bag” became “go-ruck” became GORUCK, and GR2 became our flagship travel ruck and my personal favorite.