Lifestyle Product information Devold Nansen wool sweater is a classic Devold sweater, renowned for decades and still just as popular. The Nansen series is named after one of Norway’s greatest explorers, Fridtjof Nansen, who in 1888 became the first to cross Greenland—dressed in wool from Devold. Made from 100% pure, new wool from Norwegian sheep, this is a sweater that keeps you warm—whether you’re hiking in the mountains or strolling through the city.