The Oakley Sliver™ XL come to you in Oakley's own propitiatory material, O-Matter.  Its a lightweight, comfortable all day long and highly durable material. 

Part of their lifestyle range, the Sliver™ XL furnishes its frame with a slightly deeper lens, ideal for those needing a greater downward field of vision.  As it's a 6-base frame style, the gentle curve gives you a perfect frame base for prescription lenses too. Plutonite lenses, the purest known form of polycarbonate, deliver 100% protection against UV light and also up to 400nm of harmful blue light too.

Iridium, Polarized and Prizm options are in the range, so it's a versatile in its colour and lens combinations as the over Sliver range is in with visual style options.