Smith 4D Mag S 2025You can now see more than ever before. The 4D MAG S 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 Smith has evolved Smith 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