Oakley HSTN SQ 2.0, Matte Black Frame, Prizm Grey Lenses, Sunglasses The Oakley HSTN SQ 2.0 gives the HSTN a squared-off silhouette and refined straight temples for a clean, sharp look. The matte black frame is injection-molded O Matter, which Oakley builds for better strength and flexibility than traditional acetate and to resist shifting or deforming over time. An Unobtainium nosepad grips more as you sweat, and Prizm Grey lenses with High Definition Optics handle bright days. Why Buy It Squared-off HSTN silhouette with straight temples O Matter frame built to resist shifting and deforming Unobtainium nosepad for a secure, non-slip fit Prizm Grey lens with 17% light transmission High Definition Optics for clear, accurate vision About the Prizm Grey Lens Prizm Grey 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 17% 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: HSTN SQ 2.0 Product code: OO9555-0154 UPC: 888392713261 Frame color: Matte Black Lens: Prizm Grey Light transmission: 17% Base lens color: Grey Lens category: 3 (bright light) Size: L (134 mm), one size Lens width: 54 mm Bridge width: 21 mm Lens height: 44.2 mm Frame width: 134 mm Arm length: 142 mm Fit: Wide, universal fit Frequently Asked Questions How is the HSTN SQ 2.0 different from the HSTN? It has a squared-off silhouette and straight temples for a sharper, cleaner look. What size is it? One size, L (134 mm): 54 mm lens width, 21 mm bridge, 44.2 mm lens height and 142 mm arms. Is Prizm Grey polarized? No. On this model it is a non-polarized Prizm lens with 17% light transmission. Order your Oakley HSTN SQ 2.0 from BattleHawk Armory today.