Smartwool - Mens Midweight Bottom (Black) - Apparel: The heaviest Smartwool baselayer, this midweight bottom regulates your temperature and keeps you warm during cold-weather activities.
Smartwool's Zque accreditation system is the world's first traceable merino fiber value chain in order to ensure environmental, social, and economic sustainability.
Midweight NTS (next to skin) design provides superior insulation without weighing you down.