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Sally Kaplan/Gabrielle Chase/Business Insider
One of the lastest (and honestly most blessed) themes in fashion has been comfortable clothing disguised as something more formal. Take the viral Nap Dress, for example. We as a society love to say, "What, this old thing?" despite the calculation that goes into looking perfectly effortless. So when the Rag & Bone sweatpant jeans started blowing up...