The Smartwool Women's Merino 250 Baselayer 1/4 Zip is the brand's best selling, and warmest, base layer. Enhanced fit, chafe-free seam construction and panels that offer more comfort with a pack. Merino 250 is a heavier, soft, 100% merino wool fabric offers breathable warmth, moves sweat away from the body and provides next-to-skin comfort in colder conditions.
Back body seams wrap onto the front for enhanced fit
Flatlock seam construction designed to minimize chafing