The Icebreaker 260 Oasis Vertex women's half-zip baselayer long-sleeved shirt is soft and comfortable. It will help to keep you warm under your winter sports equipment, thanks to the lightweight and breathable merino wool with natural odour resistance. In addition, it features a half-zip on collar for temperature regulation. A must have for all your outdoor winter activities, such as hiking or alpine skiing. 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 move moisture away from your skin. Then, the second layer, is the insulation or fleece, that provides warmth while also dissipating heat during periods of high output. And finally, the third layer, the shell, which is the most weather-protective layer, worn on the outside of all other layers.