Being able to adapt to different lighting conditions lets you ride your best. Oakley's Fast Jacket XLs make it easy to do just that with their Switchlock Technology, which makes changing lenses as simple as flipping a switch. The frames utilize Oakley's lightweight O Matter material and feature a semi-rimless design for an extensive field of view, while a unique suspension system cradles the lenses for distortion-free vision. Oakley's XL Plutonite lenses filter 100% of all UV rays, meet the highest impact protection standards, feature Oakley's flawless High Definition Optics and offer more coverage than standard lenses. Plus, the ear and nose pieces are made of Oakley's Unobtainium to keep your glasses exactly where you want them.