Check your zippers and buckle your boots. It's time to drop in. The Smith 4D MAG brings the widest field of view and sharpest optics to give you the best possible read on the terrain, so you can nail your line every time. Whether the day dawns clear or stormy, lens swaps are a snap thanks to the quick-swap MAG lens system.ChromaPop Sun Black lensThe more you see, the more you experience. Smith's superior ChromaPop technology enhances the clarity of natural colours so you see more detail without straining your eyes.