OAKLEY REPLACEMENT LENSES: Customize the look of your Flak Jacket XLJ eyewear and get the best optical performance for where you use it most. These AOO9101LS Batwolf Prizm Shallow Water Polarized lenses are official Oakley replacement lenses that fit all Flak Jacket XLJ sunglasses. PATENTED HIGH DEFINITION OPTICS (HDO): All replacement lenses feature Oakley's high definition optics (HDO) which provides superior optical clarity and razor-sharp vision at every angle as well as clarity and protection against impact and UV light, filtering 100% of UVA, UVB, UVC, and harmful blue light up to 400mm. OAKLEY PRIZM SHALLOW WATER POLARIZED LENSES: These Prizm lenses are designed to enhance color, contrast and detail - coming in a range of color hues to match any style look. Engineered to help you identify structure and drop offs, and cut through glare in freshwater environments, the enhanced underwater contrast is made to sight even the toughest fish in lakes, rivers, and flats. VISIT THE OAKLEY BRAND SHOP: Click on the Oakley logo above to view the entire Oakley sunglasses and accessories assortment.