Cameras packed in rucksacks, he did just that, bunking down in a ski - patrol shack on windswept Vail Mountain. (si.com)
Both children appear to be in a kind of rucksack carry, the older child on her back is able to look over her shoulder. (evolutionofbabywearing.com)
However, the bag's main difference is that it comes with rucksack straps and, when I carried it on my back, I appreciated the protective cover that pulled over the wheels so that they did not come into contact with my shirt. (thetravelmagazine.net)