Long sleeve hooded t-shirt made from a unique construction combining polyester on the inside and high quality Merino wool from New Zealand. The main advantage of this combination is that polyester accelerates the transport of sweat to the outer wool layer, which has a unique antiodor preventing odor formation and also has a great thermoregulatory function. The inner thin polyester layer eliminates the "biting" of wool in people who are sensitive to this phenomenon. The underwear can be used on both sides and is ideal for sports in extreme climatic conditions: alpine hiking, ski mountaineering, mountaineering.