This Vahoglass product is a spray used to prevent fogging on eyeglass lenses. This is achieved thanks to the anti-fogging effect of the hydrophobic solution that makes up the product. The protective film achieved by the solution is interposed between the lens and the water vapour. This product has properties to avoid static and adherence. It is suitable for cleaning and brightening smooth, non-absorbent surfaces such as glass. It does not corrode metallic surfaces that contain the glasses. It does not affect plastic materials or ceramics. It is easy to remove from the support by washing with soapy water. When applied, it acts immediately and lasts for approximately 12 hours. Suitable for all people who wear glasses and also use a protective mask at the same time. It has no contraindications.