For years the use of full-face snorkel mask have been all too good with all its great benefits that cannot be gotten from the traditional type of equipment or mask, as this mask allows you to breathe both from your nose and mouth underwater so you need not have separate pieces for it.
The best benefit that you can get in using these full face snorkel mask is that they are less intrusive, more hygienic, and you will be more relaxed with one of these on, rather than constantly clenching your mouth, and they are a bit less constrictive for people with respiratory issues.
The concerns that are raised with the use of full face snorkel mask are due to the misuse of such equipment when it is supposed to be used according to its intended purpose such as recreational use or just floating on the surface and comfortably looking down onto the fishies.
The most common concern with full face snorkel mask is the CO2 build up, however seeing this concern already have made the manufacturers create innovations to ensure that this is addressed to the benefit of the user so that it can altogether more meet its intended purpose with all the safety.
So then, when you choose to purchase full face snorkel mask be sure to try on the mask and breath in it on land, and make sure only the breathing part should fog up when you try to breathe on it, and bear in mind the purpose of buying it that it is intended for relaxed snorkeling only and not made for freediving or extensive open water swimming.
Also one of the most important factors is to ensure that the mask fits well about your face and that its breathing part also fits neatly over your mouth and nose, because if this is not looked into properly, then you will have issues with the use of the mask.
Also it is important that you check the quality and brand of the full face snorkel mask, and be wary of the cheaper/knockoff models and imitations that are out in the market as that has the possibility of compromising your safety when using the mask.
Nothing will beat an informed purchaser, and it is more advisable that you research about the product that you will be purchasing especially from where it came from and manufactured, and all the same get as much info about its features so you can have all that you need to know, above all never compromise the quality over the price as it will be more convenient to buy an expensive item where you are assured of quality and its safety hen you use it according to its purpose.