When you think of the perfect fall layer, you might think of a denim jacket. But let’s be real — denim can be a little too basic. Jessica Alba proved that a leather layer is far sleeker, and we found the cool-girl look on Amazon! Alba left dinner in West Hollywood wearing a simple midi dress, a woven leather bag — and the real star of the show — a California-coded leather jacket. It has a silver zipper, shiny buttons and a glossy finish, as does this luxe-looking Amazon version. It’s a piece that instantly elevates whatever’s underneath, and it’s only $47. See it...