we're Obsessed!

This long dress would be sexy enough, just based on its curve-hugging silhouette. But the real action happens in the back, which is cut out and dips low. (There’s even a little train!) Since it’s jersey, you can stuff this dress into your tiniest bag and it won’t wrinkle. Imagine, you’re at the beach and meet an intriguing stranger, who says: I’m throwing a fabulous fancy party on my yacht tonight. Would you care to join? And you reply: How convenient! I just happen to have the perfect thing to wear right here in my tote.

$2,995; net-a-porter.com

—Megan Deem, Fashion Features Editor