FRAME FEATURES: OX3218 Socket 5.5 eyeglass frames are constructed of lightweight, durable C-5 material. They feature a rectangular, matte gunmetal frame with integrated spring hinges. PRESCRIPTION READY EYEGLASS FRAMES: Oakley eyeglass frames feature lenses that need to be replaced with prescription lenses so you can enjoy clear vision. MICROBAG AND STORAGE CASE INCLUDED: Packaged in Microbag and 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.