Layer on the comfort with the new Women's Classic Thermal Merino Base Layer 1/4 Zip. This must-have base layer features 100% Merino wool fabric, breathability, odor resistance, and a body-enhancing fit so you can explore comfortably and look good while doing it.100% Merino Wool Slim fit is intended to follow the contours of the body 100% Merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation and odor resistance Back body seam wraps to front for body-enhancing fit, Raglan sleeves 8" (20 cm) center-front zip with semi-locking slider Flatlock seam construction designed to minimize chafing Women's Smartwool Classic Thermal Merino Base Layer 1/4 Zip Plus