Great summit pack
This is a well made backpack, as one would expect from Black Diamond. I bought it for ice climbing in the Andes, and this size was perfect as a carry on. When we reached Argentina, the airline made me check the bag, but again it was small enough to fit into my large duffel checked bag. I hiked 25 Km and carried the gear we needed for a days ice climbing. For a multiday backpack, I may get the larger size of the Quantum backpack. Or, I may strip this one down as a summit pack and stuff it in my large Gregory Palisade backpack, which I would then leave in a base camp.