Is a paper cycle helmet really a good idea?

The Ecohelmet, which looks a bit like a Christmas decoration, is designed to help users of city bike-hire schemes. But can it be robust enough – and how worthwhile are helmets anyway?This week a cycle helmet made of paper won a £30,000 design award. How can something made of paper protect your head?The Ecohelmet, the brainchild of US designer Isis Shiffer, works like one of those Christmas decorations that folds down almost flat, but expands into a circle of honeycombe