We  rigorously inspect and test every pair of Sunglasses  to ensure that they pass pass our strict quality inspection, therefore we stand behind our products and can offer you a lifetime guarantee on the frames.  Nevertheless, lenses are NOT unbreakable and they may scratch, so please handle your fine eyewear with care. Our master crafter has perfectly hand set your engraved pair of polarized lenses in an advanced alloy frame. If during the normal wear of  these high quality alloy frame the sunglasses brake and or you find them to be defective please contact us to arrange for a return authorization.  Once we receive your return, we will  inspect them for defects. If the sunglasses frame is defective in accordance to the manufacturing standards, we will repair and or send you a new pair free of charge for the lifetime of the sunglasses     

No other sport sunglasses offer these great features and guarantee.