At Twin, returns and exchanges are made easy. We do our best to make returns and exchanges as easy as possible. We are pretty confident that you'll love our product. No questions asked and hassle-free exchange on all frames and sunglasses subject to the Returns and Cancellation policy*. No exchange is allowed if the lenses are shaped and fitted. However, in case of any error in the power of lenses from that you have entered, you are entitled to a money back return or a 100% credit to your wallet or bank account if complaint is raised within the first 14 days of receiving them.