Viking The origins and usage of the Norse longboats Viking art, Vikings Explore the World of Famous Vikings: History and Legends Beyond the Ships The Truth About Viking Cremation Mounds and Burial Viking Warriors Pictures Viking Coat Loki Blue. Even the toughest Vikings used the Viking Coat Loki, which is made of blue wool felt material, as a warmer. The pleasantly thick fabric looks very authentic and provides pleasant wearing comfort. It can be traced back to a find at the great trading port of the Varangians in Haithabu and dates back to the 10th century. The original find was additionally adorned with an imitation fur made of sheep's wool.