"Woolly plaid lends rustic appeal to a cozy, reversible vest that makes the perfect top layer through autumn and winter. The two-way zipper offers versatile ways to wear it, and you can flip it inside out for a totally different look." The pockets also work both ways, which is a nice touch. Unfortunately I removed the Madewell tag from the back of the neck so it could be fully reversible, but I looked up the original order and confirmed it's a size M. 024