icebreaker has the world’s best merino wool layering system. Our base layers are made with superfine merino wool, sourced from our growers in New Zealand. Merino wool clothing is naturally breathable and wicks moisture from your skin, so you can feel comfortable all day. Wear our base layers as thermals for warmth in even the most extreme cold, or under your winter clothes for cozy comfort. Merino regulates your body temperature in both heat and cold, and is naturally odor-resistant, so you can stay smelling fresh after a long day in the mountains or a hard workout at the gym. Layer with our tops and pants for cool-weather outdoor adventures or training, or with our shorts for autumn and spring hiking and cycling.