The Men\'s Merino Warm Crew is a warming baselayer, offering technical performance with an all-natural smooth feel. Made from ultra-fine 17.5 micron wool, it falls perfectly against the skin for chafe-free running, hiking or climbing. Merino is naturally wicking and odour-resistant so you\'ll be fresh as well as warm.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