Devold Expedition is designed for extreme weather conditions and proven on several polar expeditions. The inner layer is made of 100 % Merino wool, while the outer layer is 90 % Aquaduct treated Merino wool, combined with 10 % polyamide to improve durability. Devold® Expedition insulates extremely well and has a unique ability to transport moisture. The Aquaduct Merino wool is specifically designed to move moisture away from the skin side of the fabric to the outer surface where it evaporates. - The Aquaduct treatment gives the garments superior wicking properties. - Total Easy Care Merino wool: machine wash and tumble dry.