Fast Jacket™ has open-edge lens architecture to give you an advantage when looking through the downward view. We made the frame out of comfortably lightweight O Matter®, a durable material that withstands the punishment of pro sports. Each frame comes with two sizes of interchangeable nosepads to help you get a precise fit. Like the ear stem sleeves, they are made of Oakley Unobtainium® that increases grip when you perspire. A Three-Point Fit keeps the optics precisely aligned while maximizing comfort by eliminating the pressure points that come with ordinary frames that hook your ears.