Sold for the highest price of the bunch, KeyFolio Exact is the thinnest of the three cases, although it’s also unusually wide, measuring over 8” while closed and close to 20” fully extended. The entire length of the exterior is covered in a vinyl-like material in one of six colors, continuing to a magnetic flap that wraps around to hold the case shut. Inside, there’s a hard plastic shell for the iPad Air that’s well-sized, but missing button…