My Cold Weather Heavy Weight Choice
If I'm doing big miles in cold weather or with a lot of weight on my back ... these are what I pack. I use liners with these as they're very thick and have a tendency to move around a little bit more than the mid weight hiker. Still, I love them ... they give me an added feeling of security when I'm shlepping 50 plus pounds over steep and technical terrain. As with all other Smartwool products, they're durable and maintain their shape and compression through many washes.