Made from Smartwool's lightest-weight Merino jersey fabric with a nylon core, the Women's All Season Long Sleeve Baselayer provides year-round comfort and durability.Merino 150 is a breathable, soft, lightweight fabric that offers next-to-skin comfort, moves sweat away from the body, and acts as a versatile performance layer for warmer conditions. The shoulder and seam construction are designed to minimise chafing while wearing a pack.Lightest-weight Merino jersey fabric with a nylon core for increased durability while still keeping 100% Merino wool next to skin Flatlock seam construction designed to minimise chafing Offset should and side seams designed to increase comfort Side seams wrap to front for body-enhancing fitSlim fitMaterial: 87% Merino Wool, 13% NylonColour: Black