Yes, and no.
NOTHING will stop fogging 100% but this sure works well enough (took 2 applications on one lense). Wearing masks sure has a lot of hot breath foggin' up glasses; this has just taken my "breath" test and a good long walk outside. Thank God I found this (a two bottle box). One for the car, one for the house.<br /><br />A cheap best-possible way to avoid getting fogged!
Rating: 4 stars