· A synthetic underwear's moisture transporting qualifications are being combined with the heat insulating capacity of the merino wool in this garment with two functions. · This warm underwear trouser is produced in two layers ensuring the moisture to be transported away from the body to the outer layer, where it will be absorbed by the finely-fibred merino wool. ·Perfect for use during colder days, -5°C to -30°C Blaklader 1891 Underwear Merino Thermal Leggings