The phrase in query refers to a particular kind of garment, usually a sleep shirt or pajama prime, that options wording or a design referencing the left facet of the wearer, implying a most well-liked sleeping place. An instance may be a shirt with the phrases “Good Evening” printed on the left facet, meant to be learn because the wearer rolls over in mattress.
Such attire can serve a number of functions. It may be a humorous reward, expressing a choice for one facet of the mattress over one other. It may additionally promote snug sleep, associating a particular facet with leisure. Moreover, this sort of merchandise might stem from a cultural or familial custom of acknowledging a well-liked sleeping posture.