What are the best warm hiking clothes to wear in cold weather?

The best warm hiking clothes for cold weather are typically made of moisture-wicking and insulating materials such as merino wool or synthetic fibers. Layering is key, starting with a moisture-wicking base layer, followed by an insulating mid-layer, and finishing with a waterproof and windproof outer layer. Additionally, wearing insulated pants, warm socks, gloves, a hat, and a scarf can help keep you warm during your hike.