One of the trademarks of SpiegelLux is the fact that the company produces mostly mirrors made of stainless steel. This is for the simple reason that stainless steel can endure even the most severe weather conditions which is important for regions where there are cold winters, hot summers and/or fog.
Many other companies still use polycarbonate as main component due to its low costs of production. But meanwhile, there has been research on traffic mirrors and their material which concluded that stainless steel shows by far the longest endurance whereas lenses made of polycarbonate lose their sight quality within the first year already.
Thanks to the high quality of mirrors made by SpiegelLux customers will be granted many years of warranty!