Photo: Peter Rosa/Studio D

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How to Wear the Sleeveless Jacket
This is a wonderful layering piece for fall: It adds warmth outdoors, but is polished enough to leave on once you're inside. Choose a structured version for the office or a softer style for weekends.

Structured (left)
Vest, White House Black Market, $180; Dress, BCBG Max Azria, $268; Bag, J. Crew. Cuff, Silpada. Shoes, Alexandre Birman.

Soft (right)
Vest, Nic + Zoe, $188; Shirt, $295; Pants, Alice + Olivia by Stacey Bendet, $997; Necklace, Lafayette 148. Bag, Gigi New York. Shoes, The Mode Collective.