BENEATH THE SURFACE
Stay cool in tried-and-true black. From left: Hermès jumpsuit, $3,275, select Hermès boutiques, Oscar de la Renta earrings, $430, nordstrom​.com; Calvin Klein 205W39NYC dress, $6,500, Calvin Klein, 654 Madison Avenue, New York, Oscar de la Renta earrings, $370, Oscar de la Renta boutiques NADINE IJEWERE FOR WSJ. MAGAZINE, STYLING BY COQUITO CASSIBBA