Considering that Laurel was invulnerable and that weather control was standard among the United Planets, wearing a layer of protection against the elements seems somewhat redundant. In other stories, Laurel is wearing nothing but a black bikini -- how her strapless top managed to stay in position is one of the marvels of 30th Century science and engineering.
And it's interesting that Lana seems friendly with Laurel, considering that Laurel's ancestor was very likely Lana's future rival -- Lois Lane! Laurel must be secretly enjoying this irony...
Be sure to check out Jerry's older blog entries -- there's some nice Superman art during March 2007.