The Smith 4D MAG S Goggle brings the wide field of view and crisp optics of the 4D MAG to goggles designed for smaller faces. Smith's Birdseye Vision increases your overall field of view by 25% thanks to a unique curvature in the lens on the bottom of the goggle. In addition to making a lens that lets you see more, Smith also includes an interchangeable lens system. Quick levers easily release on the bottom of the frame allowing the lens to pop out of its magnetic attachment so you can change your lens just as fast at the changing light conditions - plus it's totally yard sale proof! Equipped with two ChromaPop lenses, one for sunny days and one for cloudy, you'll get color boosting vision that also enhances contrast. With such a unique and innovative design the 4D MAG S brings a new meaning to seeing is believing.