Ah, but that's exactly what I love about it: it's sort of an inversion or variant of the ever-adaptable Lantern outfits which can take whatever form the wearer chooses. It looks more like the Black Lantern's uniforms aren't chosen; they're used to hold the corpse together and prevent them from exploding or rotting away - hence the surprisingly little exposed flesh. Have any of the Black Lanterns we've seen so far exposed anything more than the arms, head and neck area? Of course not, because their outfits are preventing bits of them from falling off in the vacuum of space. Hence the fact that BL Firestorm isn't a cloud with a ring.