100% Superfine merino wool Soft,no odour,dries quickly,warmest by weight,highly breathable, fire resistant,high UV protection 100% Merino wool,machine washable and dries quickly,feels silky soft,won't stink like synthetics,natural stretch for a comfortable fit. Materials:100% merino wool Micron:17.5~20.5Mic Fabric Weight:170~400gsm Fabric Construction:Jersey,Interlock,Rib,Terry... Sewing:Flatlock ...