Merino wool is a natural baselayer material, with integral wicking and odour control properties. The Women\'s Merino Warm Pants add winter-ready insulation to the mix, keeping you warm on frigid days outdoors. These pants are made from super-smooth, ultra-fine 17.5 micron wool. They sit perfectly against the skin for chafe-free running, hiking or climbing.100% natural merino wool - super-smooth against the skintcs Warm Insulation - natural thermo-control for all winter activitiesSuperb moisture-wicking and quick-dryingIntegral merino anti-odour controlExcellent levels of stretch