The Oakley Exchange R eyeglasses feature a round-lens shape, an extension of the best-selling Exchange eyeglass. These glasses are designed with heritage-inspired B1B grip textured Unobtainium® earsocks for a secure fit. The lightweight O Matter™ front and stainless-steel temples ensure all-day comfort, while the earsocks help keep the eyewear securely in place. You can get a complete Oakley pair when you order with Oakley® Authentic Prescription lenses, which come laser etched with the iconic ellipse logo for proof of authenticity and quality. These glasses come in size 53/16/135, featuring a sleek black color and are made from propionate fabric.