The Atomic Aquatics Frameless mask is about fit, comfort and vision. The large lens and close fitting skirt work in harmony to create perhaps the widest viewing angle of any frameless mask design. The lens shape was computer designed to maximize upward, downward and side to side vision. Because an external frame is not needed, the viewable area of the lens is optimized. Squeeze to adjust buckles are tucked behind the lens for a sleek hydrodynamic design. Comes with mask box.