Handmade BERTHA horn sunglasses are handcrafted and fully inspected prior to shipping. Horn frames should last a lifetime if properly maintained. We guarantee the sunglasses of any manufacturer defects for 90 days from date of purchase. We do require a receipt with date of purchase. The warranty does not cover broken frames or damaged lens due to misuse. Please contact us prior to returning the sunglasses. We will issue a return authorization and once we receive the frames we will respond in 7 days or less. Please provide a telephone number to contact.