The Ino Mask is ideal for smaller faces with its One-Window design, a wide field of view, and low volume. Its comfortable for divers of any level and style. One-Window mask designed for divers with smaller face shapes. Wide field of view is achieved by placing the lens closer to the face. A low volume mask. Varied silicone thickness with a proprietary low-friction skirt surface of the fitting line. Similar fitting technology as the popular INTEGA and ZENSEE. 3D SYNC Technology. Round Edge Skirt. Swift Buckle 3D. 3D Mask Strap.