The Oakley Flak® 2.0 XL Sunglasses will take your performance and style to the next level. These versatile shades are engineered with enhanced lens coverage and is optimized with High Definition Optics® in a durable yet lightweight design. They were built to push your limits with innovative PRIZM™ lenses that deliver superior vision and a secure grip of Unobtanium® to keep your glasses in place while you tear it up. Fit & Design: Sport performance sunglasses PRIZM™ is a revolutionary lens technology that fine-tunes vision for specific sports and environments. The XL edition offers enhanced lens coverage and specialized lens curvature for protection against sun, wind and impact Unobtanium® earsocks and nosepads keep glasses in place, increasing grip with sweat Patented High Definition Optics® provides superior optical clarity and razor-sharp vision at every angle O-Matter™ stress-resistant frame material is lightweight and durable for all-day comfort Sunglasses include a Microclear™ bag for cleaning and storage Hand wash and air-dry the Microclear™ bag regularly