The Icebreaker 260 Tech HZ women’s half-zip baselayer long-sleeved shirt offer all the natural benefits of merino wool in a versatile, comfortable design. The merino wool of that baselayer insulates offers great insulation, resists odours and offers great breathability on runs, hikes and summer trips into the mountains, in winter and summer alike. This garment is part of a layering system that provides comfort and warmth for your outdoor activities. Easy to layer, this base layer enables you to regulate your body temperature by wicking moisture away. This onion layering system is made of three types of clothing. The first layer, worn next-to-skin, will provide warmth and quickly wick moisture away from your skin. The second layer is the insulation or fleece that provides warmth while also dissipating heat during periods of intense effort. Finally, the third layer, the shell, is the most weather-protective layer and is worn on the outside of all other layers.