These glasses were meant for sports. Its High Definition Optics (HDO®) lens support wide-open view with superior side protection and clarity while also meeting ANSI Z87.1 standards. Plutonite® lens material provides UV protection that filters out 100% of UVA / UVB / UVC & harmful blue light up to 400nm. Iridium coat reduces glare. The frame is crafted from 0 Matter, a light-weight, stress-resistant material for comfort and precise fit. Oakley’s Switchlock technology allows you to quickly change lenses based on race/training day’s weather, while the retaining strap ensures the glasses won’t fly off as you’re flying down hills and past competitors. It’s the ultimate in sport eyewear.