Midweight merino base layer bottoms designed to help regulate temperature during high-intensity activity, the 200 ZoneKnit™ Leggings feature 100% pure and natural merino wool. Icebreaker 200 ZoneKnit Leggings Womens Features: ZoneKnit™ - Engineered body mapped technologyto regulate your body temperature andlet your skin breatheduring high-intensity activity Gusset for mobility and comfort Flatlock seams to prevent friction