The name comes from the fin holder on surfboards, and along with the comfortable flexibility of temple sculpturing inspired by modern longboards, this rectangular-lens style comes with adjustable wire core temples that let you make the fit your own. • Constructed of light weight, durable O Matter™ material • Unisex Lifestyle • Wire core temples for adjustability New O Matter™ TruBridge™ interchangeable nosepads, comes in 4 sizes for a proper fit • Comfort and performance of Three-Point Fit that holds lenses in precise optical alignment • Three sizes 51/53/55 • Protective carrying case included • Available with Oakley® Authentic Prescription Lenses