Dolomiti metal frames are all made with Alpaca silver, which is an alloy mostly composed of copper, and also with nickel (there is no "silver"). The high copper content provides a softer color and better wearability, and has properties allowing it to be adjusted to fit perfectly.  Copper also provides proven health benefits.  All high quality Italian eyewear frames have used Alpaca for decades due to its superior wearability, and adjustability.