Mine is the Shubur---- Concept, flip up. It has the polorized inside shield that has a lever on the outside. easy to flip up or down. The full face shield is independant of the inner dark. the dark one inside only comes down about 2 or three inches. the outer shield can be changed in just a couple of minutes but I understand they are very expensive, like $85. The only drawback is I've been considering some track days and they don't consider the concept a full face helment, also not Snell appv.