Courtesy of Madewell

Summer outerwear can be tricky, with the heat and humidity making most jackets too heavy or bulky. But Madewell's Workwear Blazer is the perfect seasonal fix. Made from cotton and linen, this navy-blue striped piece is light enough for even the stickiest of days. The jacket is fitted throughout the body, but the sleeves are loose enough to roll or push up, and the patch front pockets are a great for stashing keys, lipstick, and cash. Best of all, the slightly shrunken waist adds the perfect tailored touch to a summer dress.

$145 at Madewell, 486 Broadway, nr. Broome St.; 212-226-6954 or Madewell1937.com.