Icebreaker ZoneKnit Merino 200 Long Sleeve Crew

Women's strategic merino wool base layer using Icebreaker's ZoneKnit technology to place 200g merino zones for warmth and stretch mesh zones for breathability exactly where needed during cold-weather running. RWS-certified merino with a women's-specific fit; praised by Switchback Travel as a top breathable base layer for high-output cold efforts.