People's Outside Wear In Iceland?

Very warm coats for sure

there are several Icelandic brands of outerwear that are really popular. We've got 66north, cintamani, and icewear.

most of the workmen that are outside in the winter wear overall snowsuit things, and those are also really popular for younger children.

however, a lot of times you'll see people in total denial that it's cold.  if the calendar says it's supposed to be summer, they're gonna wear a t-shirt even if it's just above freezing.