GFOUK Car Sun Visor Anti-Glare Mirror helps against sudden glare from bright sunshine and is particularly useful in low winter sunshine when existing sun visor is inadequate. This dims strong or high beam lights from Car or other sources pointing directly at you while driving at night and the solar panels can filter out 90% of harmful rays protecting your eyes effectively. OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.