Caberg – The helmet Innovators have been making Crash helmets for us motorcyclists since the 70’s and they certainly know a thing or two.Duke is the result of the experience Caberg gained from being the first Italian company to produce flip up helmets. Duke comes with the dual homologation P/J which allows you to ride with the chin guard open. With the lever in the “J” position, it locks the chin guard in the fully opened position avoiding the chin guard to accidentally close.