Oakley Standard Issue Exchange, Matte Black Frame, Prizm Sapphire Lenses, Sunglasses The Oakley Standard Issue Exchange uses a mixed-material design inspired by Oakley's Currency eyeglass. A lightweight matte black O Matter front sits on stainless steel temples, and B1B grip textured Unobtainium earsocks help keep the frame planted. Standard Issue is Oakley's line for military, law enforcement, first responders and the people who support them, and these frames carry the same lens technology Oakley builds into its core collection. Prizm Sapphire lenses add a bright blue mirror look over a grey base. Why Buy It Mixed-material frame: O Matter front with stainless steel temples B1B grip textured Unobtainium earsocks for a secure hold Prizm Sapphire lens with 12% light transmission for bright light High Definition Optics for clear, accurate vision Regular, universal fit for most face shapes About the Prizm Sapphire Lens Prizm Sapphire is part of Oakley's Prizm lens family, which is tuned to boost color and contrast so you pick out more detail. This lens lets about 12% of visible light through and sits on a grey base, which puts it in lens category 3 for bright light. Expect a crisp, natural-looking view on sunny days at the range, on the water, on the road or around town. Browse more Oakley sunglasses or the full lineup of sunglasses and outdoor eyewear at BattleHawk Armory. Specifications Brand: Oakley Model: Standard Issue Exchange Product code: OO9483-0856 UPC: 888392708700 Frame color: Matte Black Lens: Prizm Sapphire Light transmission: 12% Base lens color: Grey Lens category: 3 (bright light) Size: L (133 mm), one size Lens width: 56 mm Bridge width: 17 mm Lens height: 42.6 mm Frame width: 133 mm Arm length: 136 mm Fit: Regular, universal fit Frequently Asked Questions What are the temples made of? Stainless steel, with B1B grip textured Unobtainium earsocks on the ends. What are the frame measurements? 56 mm lens width, 17 mm bridge, 42.6 mm lens height, 133 mm frame width and 136 mm arms. Is Prizm Sapphire polarized? Not on this model. It is a non-polarized Prizm lens with 12% light transmission on a grey base. Order your Oakley Standard Issue Exchange from BattleHawk Armory today.