COMFORT: ThinOptics Computer Glasses are feather-light. Weighing less than 2 sheets of paper, you might just forget that you're wearing them! STRENGTH: All ThinOptics Computer Glasses are super durable. The frames are made of shatterproof, thermo-injection molded, optical-grade polycarbonate. The 4mm thin Milano case is exquisitely crafted from aircraft-grade aluminum. QUALITY: We use the same non-polarized lens material regularly seen in high-end prescription glasses. These lenses are available in plano lens as well as four strengths (+1.0, +1.5, +2.0, and +2.5) and are created by one of the most advanced optical lens manufacturers in the world. FIT: With a 15mm bridge width, 42mm lens width and 132mm temple length, the full-size frame and stainless steel (hypo allergenic) temple of these Computer Glasses have been designed to fit most faces. CONVENIENCE: Every pair of ThinOptics Computer Glasses + Milano Case is imbued with a mild yellow filter to block blue light and comes with a non-residue adhesive strip that'll stick to your phone/case, laptop, or any other hard & flat surface so your reading glasses are Always With You.