These Oakley FLAK 2.0 (A) frames feature a Semi Rim design and a flex hinge for added comfort. Oakley's Plutonite Lenses offer top UV Protection filtering 100% of all UVA, UVB, UVC and harmful blue light up to 400mm. Patented High Definition Optics (HDO) provides superior optical clarity and razor-sharp vision at every angle. Options featuring PRIZM Lens Technology are designed to enhance color, contrast and detail so athletes can make the most of any activityThese frames are designed with light-weight O-Matter material for superior comfort and durability. These Oakley Sun frames feature a Rectangle shape perfect for round or oval shaped faces.