The last day of Europe's Spring menswear schedule belonged to Lanvin. Fair enough—Lucas Ossendrijver pioneered the pajama-easy languor that has been one of the season's biggest trends—but he wasn't resting on his laurels. The designer originally opted for a big-volume statement, but then he decided to inject a little tension into the collection by torturing the volume into something else. He did this, for instance, with the elastic that tightened cuffs and gave a blazer a blouson waistband. Ossendrijver also used pintucking, pleats, or ruching on the sleeves of a safari jacket, or on a pair of pants so narrow they might have been leggings. It was a way of giving the sinuous fabrics he favors a new movement.