Smartwool Classic Thermal Merino 250 Quarter Zip Baselayer Black Dot Fit: Slim Our 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 Flatlock seam construction designed to minimize chafing Color: Black and Charcoal Heather Size: Small Approx. Measurements (flat lay): Underarm to Underarm: 16 inches Sleeves (from neck): 29 inches Length: 26.5 inches 100% Merino Wool