The Kulm sweater is a technological marvel. Keep warm in this high-performance half-zip midlayer. The four-way-stretch, technical fabric is knit with a premium Merino wool blend that is soft, quick drying and warm. With a merino exterior and a tech-blend interior, the Kulm sweater offers the best of both worlds. We've engineered an open-structure knit panel on the back and under the arms for ventilation where you need it most, keeping you comfortable even when you're working hard. The interior lining feels amazing against the skin as it efficiently wicks moisture away from the body. The ribbed collar, hem and cuffs are comfortably stretchy and bring classic sweater style to this high-tech layer.