The P/J lever on the left side locks the chin guard in the fully open position so it can't drop back down while you're riding. This is what separates a proper flip-up from one that's just marketed that way.
Caberg Duke Evo Flip Front Motorcycle Helmet Touring Modular Plain Crash Lid
Caberg Duke Evo Matt Blue Motorcycle Motorbike Helmet
Caberg Duke Evo Flip-Up Motorcycle Motorbike Helmet - Matt Blue
Caberg Duke Evo Flip-Up Motorcycle Motorbike Helmet - Stone Grey
Caberg Duke Evo Flip-Up Motorcycle Motorbike Helmet - Indy Matt Sand Black Grey
Caberg Duke Evo Move Matt Gunmetal / Black / Red Motorbike Motorcycle Helmet
