Women's Merino Classic All-Season Merino Plant-Based Dye Bottom Color:Black Marble Wash The Women's Merino Classic All-Season Merino Plant-Based Dye Bottom is built with comfort in mind. Our Core Spun technology wraps lightweight Merino around a nylon core for added durability, while still keeping the comfort of ultra-soft, responsibly-sourced Merino next to skin, offering moisture management, temperature regulation, and odor resistance. Plus, this bottom is colored with a plant-based dye, resulting in a unique, eco-conscious design. With this bottom in your wardrobe, you can gear up for anything from intense activity to relaxing on the couch.