The Rockcraft knit is made of 100% merino wool. The knit is thick, providing excellent warmthwhen paired with your favorite base layer, it's a great start for even the coldest days. The Rockcraft works well in cool indoor spaces and as a very warm mid-layer for outdoor activities like skiing and hiking during breaks. Merino wool is much smoother in texture than regular sheep's wool. Many people who cannot tolerate regular wool can wear merino wool directly on their skin. The material is comfortable even when damp and effectively resists odors. - Regular fit - 100% merino wool, RWS certified - Round neckline Like other merino wool products we sell, this sweater is "mulesing-free," meaning the production process does not use the painful mulesing method on sheep. If you ever manage to wear this sweater out, it's a relatively problem-free waste: the wool is recyclable, and this is a monomaterial product, meaning it doesn't contain a jumble of fibers.