The Atlantis Full face snorkel mask black is designed so that breathing under water is as easy as it is above water, through both your nose and your mouth. The large lens of the Atlantis provides a crystal clear 180 degree field of view. Thanks to the new longer snorkel tube, the top of your snorkel is higher above the water surface. The Dry-Top technology ensures that almost no water will get in the mask. But ff some water flows in, it will be drained by the valves at the bottom of the mask.