The Smartwool Women's Merino 250 Base Layer Bottom is a highly rated cowgirl base layer bottom on Amazon. Made from 100% Merino wool, it offers exceptional warmth and moisture-wicking properties. The fabric is also naturally odor-resistant, making it perfect for extended wear. The flatlock seam construction prevents chafing and ensures a comfortable fit. Whether you're riding horses or working on the ranch, this base layer bottom will keep you cozy and comfortable all day long.