The O-Frame® 2. PRO XM extends the style and performance, but there is nothing medium about it. Now equipped with injection-molded High-Impact lens protection and corrected optics, raising the bar on Oakley s entry-priced goggle performance. The streamlined frame geometry expands peripheral view in every direction and provides seamless integration with most helmets. Features Fit XM: small to medium faces Flat frame for improved visibility and helmet compatibility Belt holders framed in the frame Vent ducts with foam cover Three-layer foam edge Adjustable strap with 3 silicone strips and Oakley icon Including microfibre sacks Oakley Logo Applications All Oakley lenses offer HDO® Technology with the following benefits Clarity: Conventional lenses can magnify images. HDO® precision gives less distorted vision across the entire field of view. Refraction: With regular lenses, objects aren’t really where you see them. HDO® offers a truer visual image so your brain won’t have to work overtime. UV Protection: All Oakley lenses block 100% of UVA, UVB & UVC rays and harmful blue light up to 400 nm.