Gunnar Optiks EPO-00103Z Epoch Semi-Rimless Color Enhanced Computer Glasses with Crystalline Lens for Graphic Designers (EPO-00103Z) i-AMP technology and Crystalline lens is engineered for the graphic designer, editor or artist that requires an equally balanced color spectrum to design and edit in true color Made of aluminum-magnesium with an onyx frame finish Lightweight construction and proper weight balance guarantee long wearing comfort without pressure points or fatigue Narrow fit frame ideal for smaller heads Comes with a 1-year limited warranty against manufacturing defects