FRAME FEATURES: OX8189 BMNG Square feature a square, polished brown tortoise frame in lightweight O-matter, with C-5 temples and O-matter earsocks for a comfortable fit. PRESCRIPTION READY EYEGLASS FRAMES: Oakley eyeglass frames feature lenses that need to be replaced with prescription lenses so you can enjoy clear vision. STORAGE CASE INCLUDED: Packaged in hard case to store and protect your Oakley eyewear. VISIT THE OAKLEY BRAND SHOP: Click on the Oakley link above the product title to shop the entire Oakley sunglass and eyeglass assortment. C-5 ALLOY FRAME: Ultra-lightweight C-5 alloy frame material with acetate stem, which is created by fusing together five metallic compounds, to create an ultra-strong chassis.