The Kari Traa Rose base layers provide maximum warmth and are perfect for building up on cold days. The Rose Hood H/Z has a classy, feminine design and is made from super fine, 1 percent Merino wool with 4-way stretch. It is wonderfully soft on the skin, breathable and naturally odor-resistant. Thinner side panels under the arms and a half zip with a high collar increase breathability. A must have� base layer.