The Smith Men's Attack Performance Sunglasses are faster in every detail. Experience the sound of speed with Smith MAG™ interchangeable technology; the lens change innovation that enables fast ChromaPop lens swapping for varying light conditions. Two ChromaPop lenses are included, and have been crafted with a lowered-brow design for increased ventilation. The Attack also features the two-position nose piece that is engineered to give you perfect fit and all day comfort. Megol temples ensure that your glasses are secure at your fastest velocity.