Black/Polarized Copper "Driving" Lens. The aggressive Kazbek XL features jagged temple arms and has a wide, traditional rectangle frame to fit larger heads. Its flexible and durable black frame is equipped with soft thermoplastic rubber nose pads and Edge-Flex temple arms to create a comfortable, nonslip fit. Multi-Fit glasses are specifically designed for a variety of facial and nose bridge structures. With the addition of an adjustable nosepiece, a perfect fit can be achieved by bending each flexible nose pad inward, outward, forward, or backward. This safety-rated eyewear has a rugged style and offers fashion and function in any situation. Polarized Copper lenses make outdoor conditions appear sharper by filtering high levels of blue light. Copper also increases depth perception and contrast, making it the ideal tint for daytime driving and golfing. The addition of a polarizing filter increases clarity by reducing glare. 8% of visible light passes through this lens color.