This Handcraft Havana glasses is crafted with Mazzucchelli acetate. We believe that good quality eyewear must be made of good material, advanced technology, skillful handmade craftsmanship, and pay full attention to the details. These fashion acetate glasses are made with 12-step hand polishing for a shinny finish. 0.1mm precision tuning on hinges, secure silent and smooth movement after 30,000cycles.