... )145gsm ~400gsm 4)4 needle flatlock/3 needle overlock Top /Pant /balaklava : 220gsm ,19.5micon ,100% superwashed merino merino wool ,rib ... stink like synthetics,natural stretch for a comfortable fit.It's like a second skin.Materials:100% merino wool Micron:17 ... superfine merino wool (17.5Mic ~ 18.5Mic), after wool top’s mercerization, the product is soft, plump, flexible, delicate, smooth, comfortable ...