C4 Martian MaskMartian is a very comfortable freediving mask that easily fits every divers 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 in extremely soft hypoallergenic silicone. Martian is ideal for prolonged dives. Martian has a traditional assembly of the lenses to the