The Smartwool Women's Merino 250 Base Layer Bottom is a highly rated option for women's cowgirl base layer bottoms on Amazon. Made from 100% Merino wool, these bottoms offer exceptional warmth and comfort. The fabric is naturally moisture-wicking and odor-resistant, making them perfect for long days on the ranch. The flatlock seams prevent chafing, while the wide waistband provides a secure fit. These base layer bottoms are also machine washable for easy care. Whether you're riding horses or working outdoors, the Smartwool Women's Merino 250 Base Layer Bottom is a durable and reliable choice.