Pull on Smartwool's Women's Smartloft 60 Skirt as an extra layer during a cold-weather run or to clean up for that after-ski beverage. Filled with Smartwool's lightest-weight, 50% recycled wool insulation, this skirt is great over Smartwool base layers. The sides and waistband are made with a stretchy knit fabric to help keep it from restricting movement, so you can stretch, climb, and run whenever you need to.