Bern G2 Helmet 2011: The Bern G2 is based on five years of enhancement and refinement of Bern's exclusive ZipMold technology and is unlike any helmet on the market. G2 features three vent settings to keep you at the temperature you desire, a removable visor when you need extra sun protection, and a newly-engineered knit liner with a 360-degree hat style fit and feel. Bern is proud to say the G2 is now the lightest, lowest volume, lowest profile, sliding-vent helmet in the market.