Oakley Sielo Matte Black w/ Prizm Grey PolarizedThe mixed material frame and seamlessly integrated performance features help cross this style from activities to daily life The BiO Matter frame front and ultra lightweight, C 5 metal temples provide durability and all day comfort. BiO= Matter is made from bio materials having at least 56% bio based carbon content (representing ratio of castor oil to fossil sources) The Unobtainium nosepads help provide retention with a no slip grip and all day
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