Atomic Aquatics Venom Mask, Black Skirt - Black/Blue New UltraClear Schott Superwite glass lens with exceptional optical clarity. Patented SubFrame design with hydrodynamic styling and no external frame. Double-layer, dual-color silicone skirt keeps the mask comfortably secure. One-window / low volume design for unobstructed forward vision and wide viewing angles. Simple squeeze-to-adjust mask strap