A.P.C.'s scarlet open-knit cotton and cashmere-blend cardigan will add a rich pop of color to a laid-back look. Layer it over a striped tee and cuffed pants to work the label's preppy style. Shown here with a Proenza Schouler bag, A.P.C. boots, Chinti and Parker top, Current/Elliott pants, Chan Luu bracelet, Aurélie Bidermann ring and a Marc by Marc Jacobs watch.