Smartwool quarter zip black and white patterned Size Lg Smartwool says: Anything. Anywhere. That's what our Women's Classic Thermal Merino Base Layer 1/4 Zip is made for. The possibilities are endless when you're wearing something this warm and ready to perform. Featuring 100% ZQ-certified Merino wool, this women's top offers all of the natural benefits you need to ski, hike, run, or train all season long. Comfortably.