Serge Cajfinger has officially returned to the Paris-based brand he founded. This is his first full collection—and it marks the label's 30th anniversary. Paule Ka has always exuded a pretty Parisian elegance—call it "seasonless chic." Find it in A-line minis with a hint of mod, little tweed jackets and easy, slouched outerwear that comes cinched at the waist. For evening? A black velvet high-low dress has something effortlessly sexy—and French—about it.