PRESCRIPTION READY EYEGLASS FRAMES: The Oakley eyeglass frames feature Demo lenses that need to be replaced with prescription lenses so you can enjoy clear vision. O-MATTER STRESS RESISTANT TECHNOLOGY: O-Matter frames are lightweight and durable, injected with molded thermoplastic that provides improved strength and flexibility to withstand shifting or deforming over time. CASE, CLEANING CLOTH AND WARRANTY INCLUDED: All Oakley frames sold by authorized sellers like Amazon are eligible for all manufacturer warranties. Included is a protective case and cleaning cloth to clean and store 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.