In the 1960s, Balenciaga was an innovator in his use of fabrics: he tended toward heavy fabrics, intricate embroidery, and bold materials. His trademarks included "collars that stood away from the collarbone to give a swanlike appearance" and shortened "bracelet" sleeves. His often spare, sculptural creations—including funnel-shape gowns of stiff duchess satin worn to acclaim by clients such as Pauline de Rothschild, Bunny Mellon, Marella Agnelli, Hope Portocarrero, Gloria Guinness, and Mona von Bismarck—were considered masterworks of haute couture in the 1950s and 1960s. In 1960, he designed the wedding dress for Queen Fabiola of Belgium made of ivory duchess satin trimmed with white mink at the collar and the hips. Jackie Kennedy famously upset John F. Kennedy for buying Balenciaga's expensive creations while he was president because he feared that the American public might think the purchases too lavish. Her haute couture bills were eventually discreetly paid by her father-in-law, Joseph Kennedy.