A shirt suitable for vigorous exercise that combines the best qualities of merino wool and synthetic fibers. Thanks to merino wool, you wont turn into an ice block even if you stop for a moment to admire the scenery. Tencel fiber helps wick moisture away from the skin. A durable, flexible, and comfortable choice. - 70% merino wool, 30% Tencel - Fabric weight: 130 g/m² - Merino wool fiber size: 17.5 microns (ultrafine) - Seams are positioned to minimize chafing Devold undergarments are treated with a natural compound made to protect the apparel from wool-eating insects. It has a gentle, citronella-style scent and is completely harmless to people. The treatment protects the garment for one year and its scent diminishes and fades away with airing the garment.