The Oakley Castel Sunglasses is a shield design sunglass with a more relaxed silhouette than its predecessors. Castel features an O-Matter™ frame, which provides lightweight durability, as well a three-point fit design for comfort. Castel is available with both Prizm™ Lens Technology, designed to enhance color and contrast, as well as Oakley Authentic Prescription lenses which come laser etched with the iconic ellipse logo for proof of authenticity and quality.