Woolen knitwear with the addition of polyamide has unique thermoregulatory properties - it helps to maintain optimal body temperature, including when changing indoor/outdoor locations, with different activities. The underwear will be warm outside even in frosty weather and not hot indoors. Knitwear is freely ventilated, quickly removes vapors and sweat without moisturizing the skin, has antibacterial properties, neutralizes pathogenic microflora and unpleasant odors. Things remain fresh during the day and do not require frequent washing.