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Part Victorian bodice dress, part cozy nightgown, the ‘nap dress’ is the latest lady-of-leisure style staple to take TikTok, joining the ranks of the ‘coastal grandmother dress’and the good ol’ caftan. You’d have to be sleeping to miss the nap dress trend, which is practically ubiquitous online and at all your favorite retailers. But the concept was coined by Nell Diamond, CEO of luxury leisurewear brand Hill House Home in 2019.