The Heist Brim Limited Edition Carbon Helmet is an upgrade for Bern's already game changing lid. It is designed with interior Energy Absorbing Ribs for which allow for greater impact dispersion. The Carbon Fiber Shields adds durability and this Carbon helmet has advanced safety features like no other. Bern's Dual Shell Integration (DSI) combines a rugged ABS top shell with a Zipmold+ lower shell. The Zipmold+ lower shell further reduces weight without compromising protection. Delivers optimal ventilation, comfort and performance.