Craftsmanship is the cornerstone of DITA's reputation for quality and innovation - that is why Dita team up with some of the world's most highly regarded artisans have lasted not years, but decades. In an era of mass production and automation, Dita is committed to preserving an artistic legacy. DITA uses one of the highest grades of Beta-titanium, which is thin, durable, and extremely flexible. Beta-titanium is1/3 the weight of steel. Dita acetate frames use a proprietary tumbling process to achieve their beautiful finish. DITA uses some of the highest quality acetate available. ALL DITA All lenses feature AR (anti-reflective) coating which reduces glare on the back of lenses, gradients, mirrors and flashes An additional chemical hard coat increases scratch resistance and improves cleaning and durability.