Oakley gave the Oakley Split Jacket interchangeable lenses with Switchlock technology that makes lens changing easy and fast. Accented with true metal icons, the lightweight frame is made of stress-resistant O Matter with Unobtainium stem sleeves and nose pads that actually increase grip when you sweat. Oakley's Three-Point Fit optimizes comfort while keeping the lenses in precise optical alignment. Take a close look at how the lenses contour at the sides, maximizing protection against sun, wind and side impact. It’s a full 8.75 base lens curvature that utilizes patented XYZ Optics to offer razor sharp clarity at every angle of view. You’ll have extended peripheral vision and performance that meets ANSI Z87.1 standards, thanks to High Definition Optics (HDO). Oakley HDO also means protection, so Split Jacket meets ANSI Z87.1 standards for high velocity and high mass impact resistance. Oakley's Plutonite lens material filters out every eye-baking ray of UV, not just UVA and UVB, and you’ll have a wide array of lens options to adapt to any environment. When reflected glare threatens your vision, install optional Oakley HDPolarized lenses. They’re made without the haze and visual distortion of ordinary polarized lenses, and they filter out greater than 99% of glare while offering the performance of HDO. Split Jacket comes with an Oakley Soft Vault case that stows the lens/frame combination and an extra pair of optional lenses. Lens Distortion free lenses via Oakley’s cushioned lens suspension system | Optimized peripheral vision and side protection of 8.75 base lens curvature | Optical precision and performance that meets ANSI Z87.1 standards | Impact protection that meets ANSI Z87.1 standards for High Velocity and High Mass impact resistance | Maximum clarity at all angles of vision with patented XYZ Optics | UV protection of Plutonite lens material that filters out 100% of UVA/ UVB/ UVC & harmful blue light up to 400nm | Glare reduction and tuned light transmission of Iridium lens coating (optional) Frame Switchlock interchangeable lens technology allows for fast, secure interchangeable lenses | Durability and all-day comfort of lightweight, stress-resistant O Matter frame material | Comfort and Performance of Three-Point Fit that holds lenses in precise optical alignment | Metal Icon Accents Accessories Protective sports-specific Oakley Soft Vault included with capacity for extra lenses