Through the trees, across the park, and up the mountain, a fast pace never looked so good. Just pull on the Merino 250 Asym Top and go. Made with Smartwool's heaviest weight Merino, this top will keep you warm and cozy. It also helps regulate body temperature and manage moisture when you're on the move. A cowl neck with asymmetrical zipper allows you to dial in the style and heat you need. Flatlock seams help eliminate chafing.