All Skeleton Americas Products come with a one year manufacturer warranty covering defects. Skeleton Americas warranty program does not cover scratched lenses. Any alterations, misuse, abuse, or installation of non-Skeleton Americas lenses by Carl Zeiss will void this warranty. All warranty exchanges must be made with your original sales receipt. Please contact Customer Service at firstname.lastname@example.org prior to sending defective merchandise to obtain an RMA number. We will refuse all shipments that are not clearly marked with this number.