The British term "co-ords" or "co-ordinates" might be a foreign phrase to many of us in the United States, but you're undoubtedly familiar with the concept. From formal PJ sets to a deconstructed shift dress, these matchy-matchy top and bottoms have all the ease of a frock, but with a whole lot more charm.
As for the minor detail that some of the co-ordinates actually are pajamas? With the right styling, it totally doesn't even matter — in fact, it's a good thing! How often have you wished your outfit was as comfy as your lounge wear? Check out the nine co-ord sets that'll have you rethinking your stance on mixing and matching.