If you're trying to keep up with the competition, you need to keep up with changing light. We engineered Half Jacket 2.0 to let you swap out the lenses with ease. When they're mounted, you'll have impact protection that meets uncompromising standards. Optimized with Unobtanium® earsocks to grip better when you sweat and a lightweight O Matter® frame for comfort and durability. FEATURES - PRIZM(TM) 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 despite perspiration - Interchangeable Lenses let you change lenses in seconds to optimize vision in any sport environment - O-Matter(TM) stress-resistant frame material is both lightweight and durable for all-day comfort and protection