Bogdan takes its geometry from New York steel: a flat top bar, angled corners, and a perforated side shield carried on a lightweight metal frame. Product Details Frame: Metal Lenses: CR-39 UV-400 protection blocks 100% of harmful UVA and UVB rays. Non-polarized. Hardware: Perforated side shields, adjustable nose pads, acetate temples Size & Fitting Size: 59-17 Large Temple length: 145mm Face Coverage: Generous. A large lens front for those who prefer to cover more of the face. Bridge: Adjustable Fit