Eight lunar phases progress vertically down the center of a deep black starfield, moving from full illumination through shadow to darkness and back toward brightness. The moons display realistic surface detail and coloring, from silvery white to rust-copper tones, arranged with mathematical precision against a scattered field of white stars. Constructed from woven polyester with a soft microfiber lining and a sturdy zipper, made to order for 13 and 15 inch laptops. Everyday protection carrying an independent artist's work, not another plain black sleeve.