ZERO FOG ensures an excellent and long-lasting vision thanks to its antifog, detergents and antistatic properties. It its extremely effective on helmet visors and suitable for all ophthalmic lenses, prescription, Geko lenses and all our sport/cycle/lifestyle polycarbonate, plastic and glass lenses. It works perfectly on all lenses treated with anti-reflective, anti-scratching, anti-fouling. It does not damage treated or coloured surfaces. Features: - Lasts 24 hours- Reusable upto 500 times- Fits conveniently in pocket- Harmless, Invisible & Odorless