Oakley Standard Issue Masseter American Heritage Tonal Eagle, Matte Black Frame, Prizm Black Lenses, Sunglasses The Oakley Standard Issue Masseter American Heritage Tonal Eagle is a high-wrap frame with a rectangular lens, an 8-base lens curve and a deep-set lens groove that calls back to Oakley designs of the late 1990s and early 2000s. 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. The matte black American Heritage Tonal Eagle frame carries Prizm Black lenses, and the wrap is shaped to help block glare coming in from the sides. Why Buy It High-wrap frame with a deep-set lens and an 8-base lens curve Designed to help block peripheral glare Prizm Black lens with 11% light transmission for bright sun Lightweight O Matter frame and temples American Heritage Tonal Eagle styling on matte black About the Prizm Black Lens Prizm Black 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 11% of visible light through and sits on a grey base, which puts it in lens category 3 for bright, direct sun. 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 Masseter American Heritage Tonal Eagle Product code: OO9486-1860 UPC: 888392695024 Frame color: Matte Black Lens: Prizm Black Light transmission: 11% Base lens color: Grey Lens category: 3 (bright light) Size: M (130 mm), one size Lens width: 60 mm Bridge width: 19 mm Lens height: 40.4 mm Frame width: 130 mm Arm length: 131 mm Fit: Narrow, high bridge fit Frequently Asked Questions What does the fit look like? It is a narrow, high bridge fit, made for a high nose bridge and lower cheekbones. What size is it? One size, M (130 mm): 60 mm lens width, 19 mm bridge, 40.4 mm lens height and 131 mm arms. What makes this version different? It is the Standard Issue American Heritage Tonal Eagle edition, product code OO9486-1860, in matte black with Prizm Black lenses. Order your Oakley Standard Issue Masseter American Heritage Tonal Eagle from BattleHawk Armory today.