The subject of thermal underwear is not glamorous, but it is important. A product from Sweden has recently attracted a lot of attention. They were developed for workers on the oil rigs in the North Sea, who experience some of the worst working conditions imaginable. In each test we have received very positive feedback on its durability, comfort, and warmth. Reynolds says Ullfrotte products are unique because they are made from Merino wool from Australia.
Merino wool has a much finer fiber diameter, which makes it itch-free.
The wool is woven into a terry-knit, which has loops that create lots of dead air space for the weight of the garment. This characteristic enhances the wool's ability to retain warmth and allows a lighter garment to have a higher thermal value. Wool also has the ability to wick moisture away from the skin. Wool can absorb up to a third of its weight in water without feeling damp. Ullfrotte claims that the wool in their products resists odor much more readily than does ordinary thermal products.