HJC - RPHA 12 Solid Helmet HJC HJC - RPHA 12 Solid Helmet is built for speed days and track sessions where stable vision and cooling matter. The shell stays composed in clean air, vents draw heat through the liner, and the padding locks in without pressure points. Why We Like It: It feels calm on the front straight and steady tipping into fast corners. Why It’ll Work for You: You get clear sightlines, airflow you can feel, and a fit that stays comfortable through long stints. Variants / Options: Available in multiple sizes and colorways for a dialed-in fit. Key Features: Premium Integrated Matrix EVO (PIM EVO) Optimized aerodynamic performance for reduced lift and drag for enhanced stability Optimized rear spoiler Aerodynamic focused shell shape HJ-42 curved shield and ratchet reduces air drag and noise 2-Way pivot ratchet system provides improved sealing Maximum air intake, 4 intakes and 3 exhausts Enlarged front intake for maximum defogging Removable interior cheek pads Emergency pull tab