Third pieces (like cardigans and blazers) are just as important for women as for men, especially in summer - they finish off simple outfits, keep away the chill of the air conditioning, and provide coverage over skin-baring silhouettes. Just be sure to grab a blazer that's appropriate to the season - in an easy breezy linen, a cool cotton or breatheable silk.

Check out this great striped blazer from J Crew, and three ways you can make it work for you this summer.

AUGUST 2017 NOTE: Although great style is timeless, product links are not. This post was originally on the blog a few years ago, so the links below will not work - but scroll down to the end of the post to check out a few of my favorite summer blazers, currently in stores.

TAKE IT EASY

Wideleg linen pants, a colorful silk tank and some nude sandals. A no-brainer summer outfit, right? Add a structured blazer, and you've instantly upgraded.

KEEP IT SERIOUS

Have a body-conscious summer dress that you'd love to wear to the office, but not sure if it's appropriate? A blazer can take it from sexy to serious, and low key accessories keep it professional.