Viking Age Scandinavian Clothing
First up, when I am asked to teach a class on Viking Age Scandinavian Clothing, the first 10 minutes of my class is "this is the definition of a hypothesis"
I am kinda defined by research. That is who I am. Sorry?
Anyway. Go look at this first: http://urd.priv.no/viking/
I am not going to repeat what Hilde Thunem has done. She has done an AMAZING job, just go read her pages.
In VERY short, women wore a linen layer against the skin, sometimes with a wool tunic layer over that, and most of the time with an aprondress over that. Exceptions abound.
Here is my (very long) justification for my specific linen tunic choices: https://drive.google.com/file/d/0B7XBR4zfN81Qc1ktc1REZjFoQnc/edit?usp=sharing
Likewise, men were likely wearing a linen "shirt", then a wool tunic. They also had pants, of various types.
Everybody had a cloak/shawl thing, and a coat-thing. And socks and shoes, mittens, hood, etc.
Apparently belts were fairly common for men, but had strong social connotations for women (see: http://www.medieval-baltic.us/vikbuckle.html).