Though A.P.C.'s 'Molleton' sweatpants are great for lounging in, they are, as you might expect from the Parisian house, smart enough for venturing outdoors as well. Made from fleece-back cotton-jersey, they taper towards the hem and have discreet on-seam pockets and a drawstring waistband. Wear them with a hoodie around the house or a shirt when you need to leave.