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.