The term “mask volume” refers to how much air there is inside the mask. Low-volume or low-profile masks sit closer to your face so offer a more streamlined swimming experience. Since there is less space in a low-profile low-volume mask they are easier to clear should you get water in your mask. High volume masks have more space between the lens and your face which increases peripheral vision and provides the impression of being more open. However, they can cause drag in the water and need more work to clear since they have more air to displace or “blow out.”
Make sure you choose the proper mask for your needs by consulting our Snorkeling and Scuba Diving Mask Buyer’s Guides!