You can now see more than ever before. The 4D MAG Low Bridge Fit raises 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, we have evolved Smith MAG by integrating the dual locking mechanisms into the goggle frame outriggers to make a quick and easy lens change system. We know that with BirdsEye Vision featuring ChromaPop (TM) lens technology, you 'll be able to see even more detail as you take on untracked territory. Smith 4D MAG Low Bridge Fit Goggles + ChromaPop Everyday Rose Gold Mirror Lens | White | Christy Sports