I bought this at the same time I bought my helmet. When my helmet arrived it already had one of these installed.
Bell Star Helmet Breath Deflector Chin Curtain
List Price: $12.95
Sale Price: $12.95
Bell Star Helmet Breath Deflector Chin Curtain.
Item Code: BellStarBreathDeflectorChinCurtain
Fits: For Bell Star Helmets Only