Installation Steps: 1. Clean the helmet lens with a tool and tear the protective layer. 2. Place the anti-fog film inside the helmet. 3. Gently press the anti-fog film on the lens from the middle to the edge. 4. Completed. Features: Full-frame universal helmet anti-fog patch. Protects vision and eye skin by sterilizing UV rays. After the rain it has been wet, it will not reduce the anti-fog effect, after wiping it with a cloth, it can be used continuously. Suitable for full helmets, half helmets, and open helmets. Specifications: Product name: Anti-Fog helmet film Size: 24.7 * 7.3 CM Quantity: 1PC Anti-fog in winter, safer riding Package: Anti-fog motorcycle helmet film Show More Show Less