Made out of wood pulp. Even so, the 20-pound bike will, according to a story by Fast Company [1], support riders weighing up to nearly 500 pounds. It will also be waterproof and fireproof.<p>If that's true, I think there might be punch of other use cases for the material.<p>[1] <a href="http://www.fastcodesign.com/1670753/this-9-cardboard-bike-can-support-riders-up-to-485lbs" rel="nofollow">http://www.fastcodesign.com/1670753/this-9-cardboard-bike-ca...</a>