A Classic Warm-Weather Staple: Cotton Poplin Shirtdress A classic J.Crew style gets a summery upgrade with this Cotton Poplin Shirtdress ($45 with code SALEONSALE). Whether you wear it over a bathing suit or on its own to roam the city, you'll find that it's just the perfect warm-weather dress, thanks to the short sleeves and loose fit. Image Source: jcrew.com Cotton Poplin Shirtdress $45 from jcrew.com Buy Now