Replacement SHOEI CWR-F2 Pinlock®-ready Photochromic Shield for use with the SHOEI RF-1400 Helmet. Transitions® Photochromic technology allows visors to automatically and seamlessly change from clear to dark in sunlight. The process works when photochromic dyes embedded into the lens or shield react to UV light, changing levels of darkness with the sun.All-new CWR-F2 shield system features improved visibility, functionality, and performance.Fades to 50% transmission in two minutes.2D "flat" outside surface combined with 3D technology inside offers an aggressive look with optimized visibility for a more natural view.Vortex Generators (borrowed from X-Fourteen technology) improve aerodynamics and reduce wind noise.X-Fourteen Data: Drag = 8.8% reduction; Lift = 3.5% reduction; Yawing = 52.4% reduction.All-new center locking mechanism reduces risk of accidental openings during high-speed riding.