Our Merino wool fibers are sourced from the rugged Southern Alps of New Zealand, where conditions are harsh and challenging. Lightweight and soft, Merino wool is warm in the winter and cool in the summer. The versatile collection includes base layers, men's and women's underwear, T-shirts and jackets. icebreaker offers sustainable, eco-friendly clothing for urban to mountain activities, hiking, skiing or relaxing. Get back to nature.