Lanvin High-Tops   So sometimes—ok, a lot of the time—fashion is about wanting something really bad you can't necessarily afford and don't necessarily need. Take these suede Lanvin high-tops, for instance. You might have to skip a few meals to afford them but, hey! You'll feel invested in them. I like that they have the look of a cool designer shoe without being too flashy, too. Look for them at are Barneys, Bergdorf Goodman, Nordstrom's, and online at Mr Porter.    $885, available at luisaviaroma.com
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