They have no sombreros today at La Caty 555, the gift shop tucked inside Mexico’s new Live Aqua Urban Resort in San Miguel de Allende. But a dozen or so mod, wide-brimmed straw and felt hats hang on the boutique’s gray stone back wall, seemingly left by some stylish, latter-day Frida Kahlo (or awaiting purchase by a Mexico City fashion blogger). Like everything else in the shop -- leather bomber jackets trimmed with bright embroidery panels, lava-stone salt cellars, wooden skull-motif trays in neon hues -- the hats are "hecho en Mexico" but feel far from stereotypical souvenirs.