(2 of 7) Fashion Week Highlights: Day 7Designers flaunt their finest at the tail end of New York Fashion Week. Calvin Klein While the key pieces of the Calvin Klein spring line—halterdresses, silk column gowns, and white pantsuits—have roots in the '70s, there’s nothing nostalgic about Francisco Costa’s new collection. When viewed on the runway, his separates emanated modern elegance thanks to his use of icy hues, liquid-like silks, and streamlined silhouettes. Even his shirtdresses—a classic Mary Tyler Moore–era style—looked novel when fashioned out of faintly patterned gray silk georgette and extended to a midcalf length.