1. The anti-fog film is made of a special molecular structure material with anti-fog function. 2. Continuous anti-fog for more than 5 years. Protect eyesight and eye skin by disinfecting ultraviolet rays. 3. After the rain is wet, the anti-fog effect not be reduced after wiping with a cloth, and it can be used continuously. 4. Suitable for full helmet, half helmet and open helmet. Size: 24.5 x 8.5cm (anti-fog patch for helmet) Material: PE colour: Transparent Package Contents: 10 x helmet anti-fog film 10 x Alcohol bag 10 x Dust removal sticker 10 x installation tool 10 x Cleaning cloth Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.