The Information You need to Choose the Best Snorkel Mask.
You cannot do snorkeling without getting a mask, but getting the wrong one is no better because much of your time will be spent fiddling with it instead of doing the actual job. That is why you cannot afford to make the wrong choice. The first thing you should determine is how well it fits. The purpose of the rubber area of the mask is to avoid water getting on your skin. If this part is not doing its work maybe because it is not snug, you will fatigue easily and problems like fogging and leaking cannot be ruled out. You will have to stop on several occasions to get rid of the water that has already leaked on your face. You do not want fogging because it reduces your visibility.
Silicone masks are much better and if you want to find one that is going to serve you well for years, you need to find a silicone one. You expect a rubber mask to develop lines of weaknesses over time and you will have cracks on it as days go by and you cannot ignore this because it is a danger to your health. Ensure the mask skirt is wide too. It gives you comfort but this is not the only thing it does because the surface area allows for a snug fit.
As much as you need a snug fitting mask with a wide skirt, you also need to see what is happening in your periphery. This will be compromised if the mask is too large to cover some part of your eyes. It is good to test your peripheral vision with the mask on before making a decision to get it. Some masks will have you feeling like you are sitting before picture windows while others will give you a tunnel vision and neither of these situations is good. The wider the angle of your view the better. There is no mask that does not have the possibility of fog formation but you can get one that has a low fog. It is something worth noting when you are buying your snorkel mask.
When you are submerged, you will not be able to see as clearly as you would if you were on the ground which is why you need a mask which comes with vision enhancing coatings. It is not an ability for you to see when there is no light but they make images clearer, sharper and crisper but removing some wavelengths from the light and reducing glare as well.