The Wool Tech Light Loongsleeve top provides effective thermoregulation in all conditions. The high Merino wool content provides effective odor management and fast moisture transfer for dry underwear in all conditions. Features: Composition: 55% Virgin Merino Wool - 44% Polyamide - 1% ElastaneSuperior thermoregulation in cold and hot conditionsEfficient evacuation of moistureFast dryingGood odor management thanks to the natural properties of Merino wool Nordic thermal underwear Falke ---Wool Tech Light Longsleeve Shirt M Black