Rooted in surf and skate culture, we went double-barrel with frame materials to create Twoface™, a rare look that pairs lightweight yet durable O Matter™ with lower rims of aluminum. Clean lines keep the look original, and with High Definition Optics® (HDO®), unbeatable clarity and proven protection go along for the ride. Features Lightweight O Matter™ frame material with Square O-Metal icon accents Precision-formed aluminum lower orbital base lens geometry with HDO® High Definition Optics® Lenses 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.