Is super hydrophobic coating worth it?
So yes, hydrophobic coatings really do work. They do not completely clear water or sweat droplets every time, but they are much better than ordinary sunglasses lenses without a hydrophobic coating.
How long does super hydrophobic coating last?
This coating will off er approximately one year of outdoor life before recoating of the top coat would be required. When used in indoor or covered applications outdoors, the coating should last for a year or more.