One for the baldies........

Giro Pro light - I bought one of these a couple of weeks ago, and it is allegedly the lightest race helmet in the world - 172 grams (size medium)!  But they are missing the main selling point!  It doesn't have any hard plastic retaining parts at the rear which scratch or jag your head.  So if you have no hair or wear it short at the rear then this may be for you. RRP £149.99 but you can pick them up on the web for £119.