Puff-sleeve dresses are the trendiest fall look, and we couldn't be more excited. Not only are they fashionable, but the sleeve style effortlessly flatters the arms. We found the best puff-sleeve dresses for fall, and they start at just $15! Puff sleeves conceal batwings, balance proportions and lengthen the arms, all while framing your silhouette and making your entire body look leaner. Whether you're sipping cider at an apple orchard or attending a fall wedding, you'll look and feel your best in these picks below. 19 Puff-Sleeve Fall Dresses That Slim the Arms 1.