DB OM5054 This frame is part of the Bio-Acetate Mazzucchelli x DbyD collection. The DbyD brand has partnered with renowned Italian manufacturer Mazzucchelli, the world leader in bio-acetate production, to design a line of optical frames using M49, a bio-acetate that is responsibly sourced and biodegradable. These great quality Havana frames are made out of Acetate. They are available to buy online. All of our glasses include single vision lenses as standard and a cleaning cloth and case. The lens width on this model is 51mm.