Smartwool Classic Thermal Merino Base Layer 1/4 Zip - Women's Outdoor Research We’ve taken that sentiment to

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Smartwool Classic Thermal Merino Base Layer 1/4 Zip - Women's Outdoor Research We’ve taken that sentiment toSmartwool Classic Thermal Merino Base Layer 1 4 Zip Women's 2026 Ladies Smartwool Base Layer Top We've updated the fit of our Women's Classic Thermal Merino Base Layer 1 4 Zip to improve functionality while also enhancing aesthetics. As one of our heaviest base layer tops and one of our best base layers for cold weather, this garment uses 100% responsibly sourced Merino wool, shoulder panels, and a flatlock seam construction to help prevent chafing as