Slimane was smart to suggest he was pitching it in a more down-to-earth way this season. There is a movement toward real, ordinary clothes going on, largely triggered by the left-of-field rise of the Vetements collective, which ingeniously repurposes generic garments. Slimane seemed to have tuned into that when he came up with a perfectly ordinary beige trenchcoat, sand-color camisole, jeans and black Wellingtons, a faded army-surplus shirt, patchworked denim capes, and leather bomber jackets that looked as if they could have been trawled from racks at the cheap end of Portobello Market. Say what you like about whether this is actually “design,” there is a skill in making a familiar-looking garment fit well and come off as generic enough to be absorbed into a girl’s wardrobe, and Saint Laurent’s sales have shot up because of it.