C4 Martian Mask GO PRO

Martian is a very comfortable freediving mask that adapts easily to every diver's face. 
It has a medium internal volume which allows the compensation effort to be limited, 
making the underwater experience more fluid.
Its design guarantees a wide field of vision, allowing a clear and unobstructed view. 
The skirt is made of extremely soft hypoallergenic silicone. Martian is ideal for prolonged dives. 

Martian has a traditional assembly of the lenses to the skirt and the mask body, using glass retaining rings.
Top Go pro mount.