Oakley created Tightrope for the kind of active lifestyle that follows the road only far enough to find its own path. Think of this frame as a sport inspiration that got a taste of the street. This pair of sunglasses walks the line between performance and polish, and in the process, gives you the best of both worlds. It takes five metal compounds to achieve the low weight and high durability of the C-5 alloy, a breakthrough that turns the temples and bridge into works of art. The comfortably secure fit takes advantage of two innovations: Unobtainium stem sleeves that increase grip with perspiration, and the geometry of a Three-Point Fit that eliminates unbalanced pressure points common with ordinary frames that hook your ears. The lenses combine 8.75 base curvature with patented XYZ Optics for clarity that extends to a wide peripheral view. Performance and protection meet ANSI Z87.1 optical and basic impact standards, and UV filtering is 100% with our pure Plutonite lens material.