A passion for science fiction drove Marcel Marongiu’s spring collection for Guy Laroche at Paris fashion week. He tested thick, techy materials on hoodies and skirts with flared hemlines, and fiber-optic fringe.

Shapes such as trenches, bombers and bubble dresses were theoretically wearable, the experimental fabrics and clunky volumes fizzled while white shirts with gold buttons and black pants were considered to be best.