Smartwool Microweight Crew Thermal Top - Women's

Smartwool Microweight Crew Thermal Top - Women's: The Smartwool Microweight Crew Thermal Top is Smartwool’s ligthest-weight thermal underwear. Naturally breathable and ordor-free, the Smartwool Microweight Crew Thermal Top can be worn alone when the going gets hot or as a base layer in cooler temperatures.