The Atomic Vision Subframe mask is the strongest, most indestructable two window scuba mask ever created. The strength is the result of an internal frame molded directly beneath the surface of the silicone skirt. Subframe provides incredible strength and rigidity and eliminates the bulky external plastic frame in other masks. The Atomic Subframe dive mask has strong optical quality with distortion free Ultraclear lenses. Atomic dive masks also feature removable lenses for corrective lens options. With the Atomic Subframe wide vision, low volume and great fit you can’t go wrong with this dive mask!