The Opus is an existing folding camping trailer, something like a pop-up camper in the U.S., but with an inflatable roof—similar to a kids' bouncy house—in place of a tent that needs to be ...

The result is the Capax, which is a 21-foot camper that can easily stow in a single-car garage without using a tent-like fabric pop-up. See All 26 Photos Yes, the Capax is a 21-foot-long trailer ...