The ATOMIC AQUATIC SUBFRAME is an extremely durable and strong diving mask. The strength comes from the use of an internal frame embedded just below the surface of the silicone skirt to which it is connected. The stainless steel frame secures the lens and increases the strength of the bridge. The wide field of view and great ergonomics perfectly combine functionality, style and durability. The exceptional transmittance and lack of distortion of the UltraClear glass maximizes the amount of light passing through, increasing sharpness, especially in low light conditions.