Smartwool's Women's Classic All-Season Merino Base Layer 1/4 Zip in cobalt blue. This soft 100% merino wool slim-fit outdoor staple, offers all the thermoregulation, breathability, and odor resistance for outdoor activities. Women's Size Medium approx. measurements armpit to armpit: 16" length: 24" Preowned in great condition -loose stitch on hem small hole near bottom hem (see last two pictures)