Dive Mask Info

Buyers guide for Dive Masks

Two window masks are two separate panes of glass held together by a frame which separates the windows. Different designs can bring the lenses very close to the divers face and help minimalize the internal volume of the mask, which makes it easier to clear and equalize. When selecting a two window mask, check that the mask frame does not press against the bridge of your nose. Under pressure it can cause pain, or possibly allow water to come in from the sides under pressure.

Single window masks have one piece of tempered glass. For a lot of users, it is easier to see out of this style of mask than out of a two pane mask because there is no frame running between the diver’s eyes. Potentially giving you a better depth perception when hunting in Open Ocean.  Also a less claustrophobic feeling.

Side window masks have two panes of glass on the sides of the mask. The side glass allows more light into the mask, giving the diver a better field of view. These masks tend to have more space/volume (hold more air) than other mask, which means they require more energy to equalize or clear of water.

Low volume masks are designed to be well um low volume. Less protruding (Also eyeballs closer to glass which gives better field of view. Less chance of catching a mate’s fin/seaweed/cave wall or being blown off in waves.) Less space between the face and the glass. So less air to clear/ equalize.

Purge valve is a one-way valve in the nose of a mask to help with getting rid of water from your mask. You just blow slowly out your nose without the need to break the seal and look up. Which may cause more water to come in. Many divers love this feature, but many feel it is unnecessary. The valve can get in the way when trying equalize. They add an extra failure point to the mask, because if they break (which is uncommon) the whole mask will flood. A purge valve is an additional luxury or an unnecessary excess, depending upon the point of view. Also if you are using contact lenses with a purge valve you can blow the water out without breaking the seal, risking a mask full of water, possibly losing a contact.

Many scuba diving masks have teardrop-shaped or elongated lenses which are designed to increase field of view. This can make it easier for a diver to spot items of interest or read gauges without turning their head.

Mask skirts should be made of high quality, flexible silicon. Most manufacturers offer extremely flexible and pliable silicon on their high-end masks. The softer and more flexible the silicon, the better the mask will seal to different face shapes, and the more comfortable it will be. The silicon colour is also important. Clear silicon will let more light into the mask from the sides, and black silicon will allow less light in. If you get claustrophobic then more light will help, and more spatial awareness with movement around you. Dark silicone is like shading your eyes with your hands. When looking into hole’s and cracks the eyes tend to adjust quicker.