Have you ever wanted to explore the ocean on a deeper level? If your answer is yes, then the H20 Ninja Mask might be for you. The mask features a built-in filter that filters out water and lets in fresh air. The manufacturers have made a great effort to keep the technology of the mask a secret, but it is clear that filter is state of the art. It is clear that the world of snorkeling has undergone a huge technological breakthrough, and we can expect only innovation to follow.