Luna

Best for: Twentysomethings looking for hot designs that won’t fizzle quickly.

Equal parts trendy and classic, the clothes at Luna stay in style for more than one season. Private-label silk kimono tops ($120) and J Brand Cigarette Jeans ($148) are affordable and chic, and the most popular items, like Milly dresses, fly off the racks. Join the mailing list and get invites to the twice-yearly Luna Party, where everything is 20 percent off.