x2s blackpearl (+bonus lens) goggle. the x2s goggle is form and function incarnate. ultra-premium, the medium-sized goggle utilizes our swiftlock lens changing system that makes swapping out lenses a breeze. coupled with lumalens color optimized technology that offer optimal color recognition and clarity. a robust anti-fog treatment and ersatzglas are just icing on the cake.this goggle utilizes features derived from dragon's patented advanced projects x (apx) technology.