The dress worn over a tunic by Norse women is often called an apron dress, however it is also known as a suspended dress, hanging dress, pinafore, Hängerock, Trägerrock (both German), or Hängselkjol (Swedish).
The apron dress is often described as a controversial garment, simply because there are so few textile remains that can be used to reconstruct from, and that there simply does not seem to be one universally-worn dress throughout the Viking-age world.
Essentially, these reconstructions can be divided in to two general categories -- closed dresses, where the top of the dress is a tube, and wrapped dresses where the dress is essentially a panel that is wrapped around the body. All of these dresses, however, were sewn with narrow, looped straps that were held in place with a pair of broaches.
The best known of this style of apron dress is the so-called 'Heddeby' style, based around a 10th century woollen rag fragment found acting as caulking of a Viking-age ship in southern Denmark (today, Northern Germany). It is believed to have formed part of a dress that was fitted at the waist and decorated with narrow braid.
Other interpretations include a peplos-like dress with straps, or a dress with a pleated front (seen at the National Museum of Denmark).
A wrapped rectangular panel style, open at the side, is believed to have been worn in Swedish Birka, alongside a similar dress where two aprons were interleaved. Another reconstruction from a Yorkshire burial is open between the tortoise broaches, the gap covered with a narrow apron.
- A Quick and Dirty Look at Viking Women's Garb in the Ninth and Tenth Centuries - http://www.cs.vassar.edu/~capriest/qdirtyvk.html
- A Burial of a Viking Woman at Adwick-le-Street, South Yorkshire - http://ads.ahds.ac.uk/catalogue/adsdata/arch-769-1/ahds/dissemination/pdf/vol48/48_051_090.pdf
- A Viking Pinafore (Description of Hedeby fragment) - http://www.shelaghlewins.com/reenactment/hedeby_apron/hedeby_apron.htm
- National Museet / National Museum of Denmark Photos - http://www.vikingsofbjornstad.gbtllc.com/MuseumCopenhagen.htm