All Lunor stainless steel frames are manufactured in our own Lumag factory on the edge of the Black Forest. By purchasing a Lunor stainless steel frame, you are supporting our eyewear makers in cultivating the knowledge and craftsmanship of traditional eyewear manufacturing in Germany. Stainless steel is an extremely durable material, which will give you many years of enjoyment. It is perfectly suited for people with allergies and is either electroplated by us without nickel, or coated. Cleaning your stainless steel glasses is also extremely uncomplicated. You can clean them regularly with the cleaning cloth provided. Every now and then you can clean your frame under clear water and if necessary a small amount of ph-neutral dishwashing detergent. Be sure to dry the frame thoroughly and gently with a soft cloth afterwards.