The Lightning series of packs (Lightning 45 & Lightning 60) are often thought of as backpacking packs. They certainly are outstanding for this application, no doubt about it. In fact, they were designed with backpacking and thru-hiking as the primary activities. But during the months and years of development (and since) it became clear that these packs would have much broader capabilities.
Hammocks are often considered a summer-only piece of gear. Well, they certainly are great on a warm evening, slowly swinging their occupants to sleep. But hammocks aren't too bad in winter either, under certain circumstances.