The Icebreaker Women's Oasis Leggings are a top-rated option for women looking for high-performance flannel base layer bottoms. These leggings are made from 100% Merino wool, which offers excellent insulation and moisture-wicking properties. The flatlock seams prevent chafing and irritation, while the elastic waistband ensures a comfortable fit. These leggings are perfect for outdoor activities in cold weather, providing warmth and comfort without sacrificing mobility.