SCA Viking kaftan - Google Search. The caftan doesn't appear to be able to close at the front when "resting" which would make it fairly cold in the front. This woman is a peer in the SCA in the USA and has a blog.
Viking women's clothing: The Køstrup find--very specific archeological information!
Wierzchnia suknia wikińska, ręcznie szyta:)
'Vikings' at Field Museum
Viking hood detail, hemming the front opening. Vikingsnitt
A review of the Hedeby harbor apron dress fragment