Folding bike helmet wins James Dyson design award

International prize goes to US designer who was worried about using bike-hire schemes without a helmet

The inventor of a foldable bicycle helmet has won a 30,000 prize to take it towards commercialisation.

The "EcoHelmet" is the brainchild of Isis Shiffer, a 28-year-old designer and bike enthusiast from New York who came up with the idea after she began using city bike-hire schemes but was worried about cycling without a helmet.