Super warm and cozy. Size M Classic Thermal Merino Pattern Crew Base Layer Shirt Grey Floral Womens Maintain your warmth and active comfort as you run, hike, bike and ski in the women's Smartwool Classic Thermal Merino Pattern crew base layer top, designed for improved performance and functionality. Interlock-knit merino wool enhances comfort, breathability, thermoregulation and odor-resistance Updated fit improves functionality and range of motion with raglan sleeves and body seams that wrap back-to-front Flatlock seam construction minimizes chafing and rubbing as you move.