Now, an innovative Swedish company http://www.hovding.com/ – is there any other kind? – has come up with a solution, so every cyclist can protect his or her bean: a fashion-fabric collar, sort of like an Elizabethan ruff, that conceals an airbag.
Read more about it here: http://www.coolhunting.com/tech/hovding-invisible-bicycle-helmet.php
The $600 price tag might seem a little steep, but compared with a head injury? Beans.