CRESSI Free-dive spear fishing mask Nano Black

Micrometric buckles together with the notched strap on either side of the mask allow easy and highly accurate adjustment of the mask, even when wearing gloves.

The volume of air inside the mask, between the face and the lens, represents the internal volume.
For free-divers and spear fishermen, the internal volume of the mask must be as small as possible to facilitate compensation.

The mask is pressed against the face when descending. As you dive underwater, pressure is applied to the mask's soft skirt, reducing the internal volume and pressing the mask against the face. This phenomenon, which can cause pain in the eyes, can be avoided by compensating the internal pressure of the mask and the external pressure applied by the water. Simple breathe out gently through your nose. Air is very precious in underwater sports, so compensation must be kept to a strict minimum.