On a boiling hot day, Paris Fashion Week offered a full day of fashion: Roland Mouret, Hussein Chalayan, Christian Dior, Isabel Marant, Lanvin and Vivienne Westwood. "Lanvin wasn't as girly and pretty as it usually is," notes Vogue''s executive fashion director Calgary Avansino, while of Dior, she says: "It really displayed the lightness of the season."