Specifications Hign-concerned Chemical:None Material:POLYESTER Motorcycle Helmet Visor Lens For KDF-16-1 Scorpion Exo 1400 Carbon, R1 Air EXO 520 EXO 391 Anti-UV Anti-Scratch Dustproof Wind Shield Fits the following helmets with the KDF-16-1 Mechanism Features 1.Fine toughness, high flexibility. 2.Multiple colors for your choice. 3.Anti-UV, Anti-fog and Anti-scratch treatment. 4.Easy to change, use immediately. 5.Protects your eyes from sunlight, wind, rain and insects while driving, guarantee your driving safety. Fitment For Scorpion Exo 1400 Carbon, R1 Air EXO 520 exo 391 Specifications Condition:, reliable quality Product Name: Motorcycle Helmet Lens Material: PC Qty: 1pcs Helmet style: Full Face Color(optional) Tea Revo Red,Ice Blue,Silver,Tea (Suitable For Daytime) Clear Revo Red,Clear Revo Blue,Clear (Suitable For Day and Night, They show different shades of color in different light ) Package included 1Pcs Motorcycle Helmet Lens Universal anti fog sticker, not snap on anti fog sticker, suitable for all sizes and helmets The REVO model looks very transparent with a light transmittance of 90%, and it will have a better effect when installed on a helmet. Principle of Photochromic Lenses 1. UV-Triggered Tinting: The lens contains light-sensitive materials like silver halide or spiropyran-based compounds, which undergo reversible chemical reactions when exposed to UV light. This causes the lens to darken, blocking intense light and absorbing UV radiation. 2. Transparency Restoration: In low or no UV conditions (e.g., indoors), the chemical structure reverts to its original state, restoring transparency for clear vision. 3. Self-Adjusting Mechanism: The entire process is automatic and dynamic, balancing optical clarity with light protection without manual intervention. Summary: The lens achieves \