Devold Expedition is an underwear garment designed with dual layers for extreme weather conditions. 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.