This is the optical quality, single vision MV Optical Model 60 with CR39 optical reading lenses. Style 60 is a bold wayfarer-style rectangle acetate frame available in Black, Tortoise, Burgundy exterior with a smooth pink interior or a Brown exterior with a smooth blue interior, very cool! This optical quality frame is made from a smooth acetate material and looks and fits great on a wide variety of head sizes. The frame has integrated nose pads and spring hinged temples, this is a stylish and hip frame that you're going to enjoy. Model 60, by the experts at Multi-View Optical are a very high end, optical quality acetate frame sized for an average (unisex) head size. These single vision CR39 acrylic lens reading glasses are available in any power from +1.0 up to a +2.0. A CR39 optical lens is the latest in reading lens technology: Impact Resistant, Thin Light Weight, scratch resistant and includes 100% UV protection. Style 60 has a smooth acetate finish with spring hinged temples. Available in black or brown. Includes a clam shell design hard protective case.. Style 60 is sized for an average head size. Here's the optical sizing scoop on Style 60: Lens: 49mm, Bridge: 17mm, Temple: 140mm