Sherwood Spectrum MaskSpectrum Mask Wed like to say that the Spectrum mask from Sherwood Scuba is one of a kind. But with four completely different lenses, its simply not true. The Sherwood Spectrum is our first Mirrored and Colored Lens mask. Each color provides a unique perspective above and below the surface. Mirrored and colored lenses not only provide a new and refreshing look to a standard tempered lens, they also enhance the lens functionality. Lens Options: