The x-silver collection is a contemporary execution of a historically relevant colorway for some of the brand’s most iconic frames. Oakley® kaast arrives as the brand's first dual-lens sunglass enabled by physiomorphic geometry, the optical design innovation first introduced in oakley™ kato. This innovation allowed for the creation of a first-of-its-kind lens to lug design aesthetic featured in the style. The o matter™ frame material is tuned for optimized fit and head retention while a 3-point fit provides all-day comfort. Unobtainium® nosepads are attached to the lens, creating a unique bridge aesthetic with no-slip grip and prizm™ lens technology to enhance color and contrast across a variety of environments and activities.