Instead of a snap-on shell, this one is a playthrough-style case fashioned entirely out of leather. LeatherSkin is limited to only four colors—flat black and textured tan, red, and blue—which are four of the five colors Apple offers as leather Smart Covers, though most differ from Apple’s flat leather texture. Still, as is the case with all of Sena’s products, we were quite impressed with the leather, which remains amongst…