My friends know that I'll happily whirl through multiple outfit changes per day, but there are (rare!) times when I just want to stay in my pajamas from sunrise to the next. For these occasions, I'm now thinking I might try this: throwing on an easy, breezy (read: nightgown-like) slip dress with a structured blazer and casual sandals. It's a look that's both sexy and sharp at once--and best of all comfortable. I could easy slip by in these dresses from Mango (above), Sincerely Jules, The Reformation, Tibi and Alexander Wang.