A full face snorkel mask is an integral item of your snorkel gear. Through this, you can see what’s beneath the sea in full view. To serve as protection to the eyes when you dive into the water is the primary objective of wearing a snorkel mask. Because it is an important item, it is necessary to pick the best mask in the market. Any high quality and well designed mask is something that should make it fit to face easily, feels right, no water gets inside and last but not the least, does its job of letting you see clearly underwater.
When it comes to choosing your full face snorkel mask, there are few points that should be taken into account like the following:
Number 1. Lenses – for the snorkel mask that you are going to buy, the ability it has to provide a clear vision is the most important factor you have to bear in mind. For this reason, you have to base your decision as well on the formation and measurement of lens. You may buy multiple, twin or single lens configuration but, the shape of lens, special coating and glass specification are other options you can get.
If you want a bigger and clearer vision underwater, then I recommend that you go for single lens as it doesn’t have bridge running across your nose.
With single lens, it is hard to replace for prescription corrections.
When it comes to twin lens snorkel masks, you can have a prescription lens replacement. They can be fitted easily as the part of the frame can be removed.
Multiple lens on the other hand have window panel for each side of mask in order to make it brighter and more comfortable.
Number 2. Internal volume – similar to the lenses, this is something that you should not take for granted as well. Basically, the volume is the confined airspace created when the mask is sealed to your face. Internal volume is subjected to compression when the diver dives in the water. There are a lot of people who actually prefer masks with lower volume as it’s more comfortable to wear.
Number 3. Mask angle – many people don’t observe that the mask angle is also a significant part of a full face snorkel mask. Many snorkel masks don’t run at same angle since the face is scraped at the bottom. This is actually beneficial as it reduces that internal volume of the mask while also improving your lower field of view. After raking the mask angle, the frame will moved back to the cheek bones, making it easier to look downward.