Like many cyclists, Jeff Woolf has been involved in a serious crash, one that might have killed him if not for his helmet. So why, he wondered, do so many of his contemporaries refuse to wear one? Turns out, it’s mostly because they find it hard to carry around, they’re thick and bulky, and don’t fit into bags or backpacks. And that was a problem that Woolf, an engineer, knew he could fix. The result: Morpher, a bike helmet was made from interweaved plastics that is just as strong as its traditional counterparts, it meets general safety requirements in both the U.S. and Europe, but flexible enough to fold almost totally flat, making it easier to transport.