The women’s LIFA Merino Base Layer Crew delivers the warmest next-to-skin comfort for winter layering. This Helly Hansen merino undershirt features a 100% merino wool exterior, delivering warmth, moisture-wicking performance, and breathability. A Lila technology interior and flatlock seams enhance strength, sweat-wicking, and comfort. The immensely warm construction is complemented by a clean crew neckline.