As a person who wears glasses on a daily basis I know firsthand how easily they can fog up, leading to a frustrating experience .However, i was delighted to find this product that solves that problem! It is reusable, meaning I am saving money and reducing waste at the same time. As my tests showed, it truly does eliminate fogging, improving my visibility and making daily tasks much easier. The only con I have found is that it can take a few minutes of adjusting to ensure it is sitting correctly See full review