If the request for audience hadn't been enough to raise alarms when Iris realized just where in the uncivilized world Hera was beckoning her to, the addendum to wear something warm was equally alarming. How warm did she need to dress? Like travel to the Norselands in the winter and no matter how many layers you wore you never quite actually achieved a comfortable body temperature warm? Because if that was the case, she really wasn't in the mood to be tromping through snow and why in creation's name would Hera be calling her there, now?
She arrived at Hera's side in but the span of a few seconds, dressed in the heavy wool she saved for venturing far north with some god-awful leather boots, just in case there was snow or mud to be contended with, and a woolen cloak she received as a gift from her dear friend to the north. She didn't bother with mittens or scarves or anything of that nature. If they were needed, she'd just have to summon them into being from her temple. They were also gifts from her Norse friend.
Looking around, Iris was confused. Why here?
“When you said to wear something warm, I was afraid we were going to Asgard,” she said with confusion in her voice. Not that Iris minded a trip to the Norse, it gave her a chance to see Sif, but the winter's there were inhabitable by the Rainbow's standards. They were insane, the whole pantheon.