Fast Company reports: [edited]
The Alfa weighs 20lbs, yet supports riders up to 24 times its weight. It’s mostly cardboard and 100% recycled materials, yet uses a belt-driven pedal system that makes it maintenance free. And, maybe best of all, it’s project designed to be manufactured at about $9 to $12 per unit (and just $5 for a kids version.
The development to what you see today took three years. Two were spent just figuring out the cardboard complications - leading to several patents - and the last was spent converting a cardboard box on wheels to a relatively normal looking bike.