Highly flexible Woolmesh layers wick moisture better than regular merino wool underwear. A good choice for more active exercise. - 100% merino wool - Material weight 190 g/m² - Merino wool fiber thickness: 18.7 microns (fiber quality: fine) - Machine wash with wool detergent, follow the product's washing instructions Devold underwear has a slightly lemon-scented protective treatment made from natural ingredients. Its function is to protect the garment for a year, especially during storage - insects that destroy wool when they nest in wool products stored in place. The treatment is completely harmless to humans and its smell disappears by airing.