The Smith 4D MAG; Snow Goggles raise the bar for lens innovation with the introduction of BirdsEye Vision;. This state-of-the-art lens technology has a 25% increase of overall field of view compared to the I/O MAG;. In addition, Smith has evolved MAG; by integrating the dual locking mechanisms into the goggle frame outriggers to make a quick and easy lens change system. Smith knows that with BirdsEye Vision; featuring ChromaPop; lens technology, youll be able to see even more detail as you take on untracked territory. Enjoy the mountain views like never before with the 4D MAG; Snow Goggles.