Why Is the Inside of a Good Shoe Also Leather?

https://wakelet.com/wake/dJ3uuXMuhivKfNDO64lmH

Here’s the thing: when people shop for leather shoes, their eyes often gravitate to the outside — the smoothness of the full-grain leather, the shine, the color, even the style of the last (that’s the foot-shaped mold the shoe is built around)