Lanvin Track Pants JL Maze Jacquard in Light Beige. It's impossible to go unseen in these statement-making track pants from Lanvin Paris. Made from a material mix that primarily consists of a smooth viscose knit which gives the trousers their shiny exterior, the silhouette sees a duplicated pattern of Lanvin's monogram throughout, featuring a drawstring waist, contrast outseams and ribbed cuffs.