Oakley's X-Squared continues a legacy of invention by blending lightweight titanium alloy with some of the most advanced technologies ever to hone light rays. This is how originality gets aggressive, and the look is not for the uninitiated. Its for those who defy the architects of life and put up their own blueprint. This pair of sunglasses is the only 3-D sculptured, hypoallergenic, all-metal frame family on Earth. The strength-to-weight ratio is phenomenal and the feel is surprisingly light. Resilient flex couplers allow the frame to fit comfortably around the head. Unobtainium components actually increase grip with sweat as they provide the contact zones for a Three-Point Fit that holds the lenses in precise alignment. The lenses are made with Hydrophobic/Oleophobic technology, a performance coating that lets water slide off to help keep your vision clear. It also fights smudges from skin oils and lotions, and it even repels dust. The lenses themselves have a full 8.75 base curvature with the clarity of patented XYZ Optics, a benefit of High Definition Optics. Plutonite lens material filters out 100% of all UV. The lens/frame combination achieves impact resistance that meets all ANSI Z87.1 standards for high mass and high velocity.