Exchange R, a round-lens shape extension of the best-selling Exchange eyeglass featuring Oakley’s heritage-inspired B1B grip textured Unobtainium® earsocks. The lightweight O Matter™ front and stainless-steel temples are designed to provide all-day comfort while the earsocks help keep the eyewear securely in place. 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.