Photo by Devon Jarvis/Studio D.

2 of 17
One and Done
Slip into a one-piece wonder for a layered look without the bulk. A collared style is perfect tucked into a skirt for work, while casual flowier options are best over jeans.

1. Simply Vera Vera Wang, $48; Kohls.com
2. $168; Bailey44.com
3. Ivanka Trump, $89; Lord and Taylor stores
4. $55; Avenue.com