Here's how to stretch your favorite summer maxi dress or skirt into fall, according to trendsetter Alexa Chung: Just add a chunky knit sweater and your favorite sneaks (or boots) and you'll have a cozy-cool look to transition into those cooler temps. Athletic shoes are having a huge moment, so you'll definitely get a lot of wear out of your classic Converse. Pick up a new pair in a fall hue like dark green (shown here), burnt umber or chili paste red. We're obsessed with Alexa's on-trend suede handbag, and think the Zara bag we found is an excellent budget substitute. Get the rest of her look for less after the jump...