Questions abound as to whether the full face masks are safe or not. Of course, the media have considered it a huge topic to invest in - and so it easy for you to across uncountable sources of information. It is a major concern, yes, but then you deserve to have facts regarding. You would not know who is offering to surprise people with facts that are unfounded and untenable. Some people are out to ruin people's business, remember. Most people - both the visitors and locals have said a lot, and so if visitors are not good at swimming, they have weighed the option of whether to dive or not. Here is a credible, evident-oriented piece that will enlighten you regarding the safety of the full face snorkeling mask.
It is confirmed that snorkelers have lost their lives while enjoying their vacation. And no one has come forward to tell the real cause of death - accurately. So it is hard to pinpoint and consider the failure of a snorkeling mask as the undisputed reason for such death. However, most deaths have been, on contrary, attributed to failure to familiarize with water conditions and weather. In fact, most snorkeling professionals consider this a higher risk than having a full face mask on. What is more, the dive centers consider the greatest threat to safe snorkeling is increased anxiety on the side of the snorkeler. It is not the design of the snorkeling full face safe masks. Most beginners are vulnerable to panic or getting hyperventilated while in water.
A lot of stories that claim that there is a phenomenal build-up of carbon dioxide on the full face safe masks. And this brings about the death. But then how are these products designed anyway? The full face masks snorkeling device are designed in a way that it allows you to get the right gaseous exchange activities going on. So if you are relaxed, there is much of oxygen circulating in there - and you can't be relaxing deep underneath, right? If personal activities increases, such as you are swimming fast, the exchange rates increase. The amount of carbon dioxide build increases with less activity - and vice versa is true. So you expect your snorkeling device to increase its efficiency when you are anxious, or in danger as well. You see, the higher the rate of breathing the lower the carbon dioxide levels. That said, you need to ensure that you prepare well for any eventualities while in water.
Read more info here: https://www.britannica.com/technology/snorkel-ventilation-device.