Features of the Smartwool Women's Merino 250 Baselayer Pattern Bottom 100% Merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance Merino-covered elastic waistband Merrow seam construction designed to minimize chafing Fit allows for functionality while enhancing aesthetics for a range of body shapes Fabric Details 100% Merino Wool