Nothing says sunny days better than a colorful, floral slip dress. You can easily turn this summer standard into a perennial player with a few key layering pieces. For fall days, top your frock with a denim jacket or cashmere cardigan, along with a lightweight cashmere scarf and your go-to black booties. When the real chill sets in, add a pair of tights to the mix.
To buy: Zara, $70