The women’s LIFA Merino Wool ½ Zip Base Layer Top delivers the warmest next-to-skin comfort for winter layering. This Helly Hansen undershirt features a 100% merino wool exterior, delivering warmth, moisture-wicking performance, and breathability. A technical Lila interior lining and flatlock seams enhance strength, sweat-wicking, and comfort. The immensely warm construction is complemented by a ½ zip neck that allows for rapid airflow, making it a perfect ski layer.