There are merchants from other countries, as well as from within the United States, selling 'gray market' eyewear and poorly made counterfeits. Those merchants are not authorized to sell Porsche Design Eyewear in the United States. Thus, their warranties will not be honored by the US distributor, nor will their quality be assured if their eyewear is counterfeit. We are an authorized US Porsche Design Eyewear Dealer from which you may buy with confidence. Exercise caution when buying from Russia, the United Kingdom, Israel, and even the United States. Do your research to assure your merchant is authorized to sell genuine Porsche Design Eyewear in the United States.